simonrigelsford.files.wordpress.com€¦ · web view14 - mental methods for addition and...

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nit 1 - Addition and subtraction within 10

1. Drill: Addition facts within 10

2. Drill: Subtraction facts within 10

http://www.KeyStage2Maths.com/

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3. Drill: Single-digit addition facts

4. Drill: Subtraction facts within 20 with single-digit answers

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5. Drill: Numbers to 100

6. Drill: Add a single-digit number to a two-digit number

7. Drill: Subtract a single-digit number from a two-digit number

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47. Count in multiples of 10Count from 0 to 100 in steps of 10. 0, , 100

48. Add two multiples of 10Complete the questions below using mental methods.40 + 40 = 80 60 + 10 = 70 50 + 40 = 90 50 + 50 = 100

49. Count back in multiples of 10Count back from 100 to 0 in steps of 10. 100, , 0

50. Subtract two multiples of 10Complete the questions below using mental methods.90 – 20 = 70 50 – 40 = 10 90 – 60 = 30 80 – 50 = 30

51. Relate number bonds to 100 to number bonds to 10Complete the questions below using knowledge of number bonds to 100.

80 + = 100 20 + = 100100 – 20 = 80 100 – 80 = 20

52. Count on in tensFor the questions below, write the next seven numbers, counting on in tens. 5, 15, 25,

7, 17, 27,

53. Add a multiple of 10Complete the questions below using mental methods.42 + 20 = 62 22 + 50 = 72 18 + 80 = 98 27 + 40 = 67

54. Count back in tensFor the questions below, write the next seven numbers, counting back in tens. 99, 89, 79,

94, 84, 74,

55. Subtract a multiple of 10Complete the questions below using mental methods.74 – 30 = 44 87 – 50 = 37 86 – 70 = 16 93 – 60 = 33

20 80

10 20 30 40 50 60 70 80 90

90 80 70 60 50 40 30 20 10

35 45 55 65 75 85 95

37 47 57 67 77 87 97

69 59 49 39 29 19 9

64 54 44 34 24 14 4

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56. Add two two-digit numbers, bridging on a number lineComplete the questions below by bridging on a number line. 51 + 27 = 78 47 + 36 = 83 59 + 17 = 76

57. Add two two-digit numbers by partitioningComplete the questions below by partitioning. 48 + 44 = 92 66 + 29 = 95 47 + 15 = 62 28 + 53 = 81

58. Add two two-digit numbers using the column methodComplete the questions below using column addition.44 + 33 = 77 46 + 21 = 67 55 + 35 = 90

38 + 25 = 63 46 + 28 = 74 66 + 19 = 85

59. Subtract a two-digit number, bridging on a number lineComplete the questions below by bridging on a number line. 73 – 42 = 31 95 – 27 = 68 81 – 49 = 32 83 – 15 = 68

60. Find the difference on a number lineFor the questions below, find the difference by counting up in tens and ones on a number line. 83 – 48 = 35 61 – 29 = 32 74 – 29 = 45

61. Find the difference by bridging on a number lineFor the questions below, find the difference by counting up on a number line, bridging ones. 79 – 45 = 34 93 – 46 = 47 57 – 38 = 19 73 – 66 = 7

62. Subtract a two-digit number by partitioningComplete the questions below by partitioning. 59 – 22 = 37 70 – 29 = 41 84 – 19 = 65 81 – 34 = 47

63. Subtract a two-digit number using the column methodComplete the questions below using column subtraction.66 – 31 = 35 88 – 54 = 34 70 – 28 = 42

76 – 28 = 48 52 – 15 = 37 81 – 56 = 25

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64. Check by using the inverse operation with two-digit numbersUse the inverse operation to check the answers to these calculations. 45 + 43 = 8888 – 43 = 45 or 88 – 45 = 43

78 – 19 = 5959 + 19 = 78 or 19 + 59 = 78

65. Solve missing number problems for addition and subtraction with two-digit numbersComplete the questions below by finding the missing numbers.

= 35 + 25 = 72 – 39 38 + = 70

+ 26 = 84 – 44 = 47 93 – = 37

66. Round to the nearest 10Round the numbers below to the nearest 10. 77 ≈ 80 51 ≈ 50 34 ≈ 30

86 ≈ 90 25 ≈ 30 95 ≈ 100

67. Calculate number bonds to 100Complete the questions using knowledge of number bonds to 100.

56 + = 100 35 + = 100 84 + = 100 53 + = 100

60 33 32

58 91 56

44 65 4716

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68. Recognise representations for numbers to 1000Write the numbers represented by the blocks below.

69. Write numbers to 1000 in digitsWrite the numbers below in digits. Seven hundred and seventeen Four hundred

Six hundred and fifty Two hundred and four

70. Write numbers to 1000 in wordsWrite the numbers below in words. 787 Seven hundred and eighty-seven

900 Nine hundred

260 Two hundred and sixty

903 Nine hundred and three

71. Partition three-digit numbersPartition the numbers below into hundreds, tens and ones.

791 = + + 333 = + +

207 = + 780 = +

788632

990404

717

650

400

204

700 90 1 300 30 3

200 7 700 80

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72. Compare three-digit numbersFor the questions below, write < or >

885 ____ 88 828 _____ 288 345 _____ 354 678 _____ 670

73. Order three-digit numbersOrder each set of numbers from smallest to largest. 232, 223, 332, 32, 323

777, 77, 757, 575, 775

74. Count on from a three-digit number in onesFor the questions below, write the next seven numbers. 93, 94, 95,

267, 268, 269,

604, 605, 606,

395, 396, 397,

75. Add a single-digit number to a three-digit numberComplete the questions below using mental methods.269 + 3 = 272 448 + 6 = 454 295 + 7 = 302 398 + 8 = 406

76. Count back from a three-digit number in onesFor the questions below, write the next seven numbers. 104, 103, 102,

472, 471, 470,

216, 215, 214,

407, 406, 405,

77. Subtract a single-digit number from a three-digit numberComplete the questions below using mental methods.373 – 5 = 368 493 – 6 = 487 603 – 8 = 595 501 – 7 = 494

78. Solve missing number problems for addition and subtraction of ones with three-digit numbers

Complete the questions below by finding the missing numbers.

= 295 + 9 = 512 – 6 294 + = 300

+ 6 = 285 – 4 = 388 404 – = 398

> ><>

32 223 232 323 332

77 575 757 775 777

96 97 98 99 100 101 102

270 271 272 273 274 275 276

607 608 609 610 612 613 614

398 399 400 401 402 403 404

101 100 99 98 97 96 95

469 468 467 466 465 464 463

213 212 211 210 209 208 207

404 403 402 401 400 399 398

304 506 6

279 392 6

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79. Add two multiples of 10 beyond 100Complete the questions below using mental methods.250 + 30 = 280 390 + 40 = 430 570 + 70 = 640

80. Solve missing number problems for addition with multiples of 10 with three-digit answersComplete the questions below by finding the missing numbers.

310 + = 370 280 + = 320 670 + = 730

81. Count on in tens from a three-digit numberFor the questions below, write the next seven numbers, counting on in tens. 243, 253, 263,

541, 531, 521,

82. Add a multiple of 10 to a three-digit number mentallyComplete the questions below using mental methods. 332 + 70 = 402 263 + 60 = 323 744 + 80 = 824 298 + 50 = 348

83. Subtract two multiples of 10 beyond 100Complete the questions below using mental methods.490 – 40 = 450 910 – 50 = 860 520 – 70 = 450

84. Solve missing number problems for subtraction with multiples of 10 with three-digit answers


660 – = 610 330 – = 280 670 – = 590

85. Count back in tens from a three-digit numberFor the questions below, write the next seven numbers, counting back in tens. 332, 322, 312,

869, 859, 849,

86. Subtract a multiple of 10 from a three-digit number mentallyComplete the questions below using mental methods. 306 – 60 = 246 411 – 70 = 341 825 – 80 = 745 888 – 90 = 798

87. Solve missing number problems for addition and subtraction of tens with three-digit numbers


= 484 + 20 = 636 – 50 222 + = 272

+ 50 = 232 – 30 = 303 512 – = 462

60 40 60

273 283 293 303 313 323 333

511 501 491 481 471 461 451

50 50 80

302 292 282 272 262 252 242

839 829 819 809 799 789 779

504 586 50

182 333 50

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88. Count on or back in multiples of 100Count from 0 to 1000 in steps of 100. 0, , 1000

Count back from 1000 to 0 in steps of 100. 1000, , 0

89. Add and subtract two multiples of 100 within 1000Complete the questions below using mental methods. 300 + 300 = 600 800 – 100 = 700 400 + 300 = 700 900 – 500 = 400

90. Solve missing numbers for addition and subtraction with multiples of 100 within 1000Complete the questions below by finding the missing numbers.

300 + = 500 500 + = 800 500 + = 600

900 – = 400 600 – = 500 700 – = 200

91. Count on in hundredsFor the questions below, write the next seven numbers, counting on in steps of 100. 64, 164, 264,

10, 110, 210,

92. Add a multiple of 100 to a three-digit numberComplete the questions below using mental methods. 365 + 400 = 765 504 + 400 = 904 400 + 326 = 726 500 + 187 = 687

93. Count back in hundredsFor the questions below, write the next seven numbers, counting back in steps of 100. 922, 822, 722,

901, 801, 701,

94. Subtract a multiple of 100 from a three-digit numberComplete the questions below using mental methods. 888 – 200 = 688 743 – 400 = 343 513 – 500 = 13 962 – 300 = 662

95. Solve missing number problems for addition and subtraction of hundreds with three-digit numbers


= 452 + 200 = 973 – 900 265 + = 565

+ 200 = 608 – 400 = 182 831 – = 131

100 200 300 400 500 600 700 800 900

900 800 700 600 500 400 300 200 100

200 300 100

500 100 500

364 464 564 664 764 864 964

310 410 510 610 710 810 910

622 522 422 322 222 122 22

601 501 401 301 201 101 1

652 73 300

508 582 700

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96. Add numbers with up to three digits using the column methodComplete the questions below using column addition. 418 + 53 = 471 557 + 57 = 614 672 + 190 = 826 265 + 237 = 502

97. Subtract numbers with up to three digits using the column methodComplete the questions below using column subtraction. 551 – 38 = 513 739 – 89 = 650 670 – 225 = 445 854 – 479 = 375

98. Solve missing number problems for addition and subtraction with three-digit numbersComplete the questions below by finding the missing numbers.

185 + = 718 + 458 = 647 – 309 = 352 914 – = 456

99. Round to the nearest 100Round the numbers below to the nearest 10. 344 ≈ 340 627 ≈ 630 666 ≈ 670 904 ≈ 900 399 ≈ 400

100. Round to the nearest 10Round the numbers below to the nearest 100. 344 ≈ 300 627 ≈ 600 666 ≈ 700 904 ≈ 900 399 ≈ 400

101. Check by using the inverse operation with three-digit numbersCheck the answers to these calculations by using the inverse operation. 352 + 282 = 643643 – 282 = 352 or 643 – 352 = 282

704 – 275 = 429429 + 275 = 704 or 275 + 429 = 704

533 189 661 458

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102. Recognise representations for numbers to 10000Write the numbers shown by the blocks below in digits.

103. Write numbers to 10000 in digitsWrite the numbers below in digits. Two thousand, four hundred and eighty-seven Eight thousand, nine hundred

Seven thousand and twelve Three thousand and one

104. Write numbers to 10000 in wordsWrite the numbers below in words. 4224 Four thousand, two hundred and twenty-four

8038 Eight thousand and thirty-eight

9100 Nine thousand, one hundred

5002 Five thousand and two

105. Identify the digit in each place value for four-digit numbersFor the questions below, write the digit in each place value. 6,923

Thousands:

Hundreds:

Tens:

Ones:

2,193

Hundreds:

Ones:

Thousands:

Tens:

4,027

Ones:

Hundreds:

Tens:

Thousands:

57733240

55002060 5009

2487

7012

8900

3001

6

3

2

9

1

9

2

3

7

4

2

0

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106. Identify the value of each digit in four-digit numbersFor the questions below, write the value of each digit. 7,638

8 represents:

7 represents:

6 represents:

3 represents:

8,105

1 represents:

8 represents:

5 represents:

6,023

3 represents:

2 represents:

6 represents:

107. Partition four-digit numbersPartition the numbers below.

8253 = + + +

2121 = + + +

9046 = + +

7709 = + +

108. Compare four-digit numbersFor the questions below, write < or >

2848 ____ 8248 6398 ____ 6099 3824 ____ 3818 8290 ____8292

109. Order four-digit numbersOrder each set of numbers from smallest to largest. 2752, 277, 2572, 7225, 2725

533, 5333, 3535, 3553, 5353

8

30

600

7000

100

5

8000

1

8000

40

8000 200 50 3

9000 40 6

7000 700 9

2000 100 20 1

< <>>

277 2572 2725 2752 7225

533 3535 3553 5333 5353

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110. Count on in ones from a four-digit numberFor the questions below, write the next seven numbers, counting in ones. 6093, 6094, 6095,

4996, 4997, 4998,

111. Add a single-digit number to a four-digit numberComplete the questions below using mental methods. 4096 + 5 = 4101 7647 + 8 = 7655 1995 + 9 = 2004 8992 + 8 = 9000

112. Count back in ones from a four-digit numberFor the questions below, write the next seven numbers, counting back in ones. 3105, 3104, 3103,

2006, 2005, 2004,

113. Subtract a single-digit number from a four-digit numberComplete the questions below using mental methods. 5554 – 8 = 5546 6101 – 5 = 6096 3000 – 7 = 2993 4004 – 9 = 3995

114. Count on in tens from a four-digit numberFor the questions below, write the next seven numbers, counting on in tens. 4745, 4755, 4765,

7342, 7352, 7362,

115. Add a multiple of 10 to a four-digit numberComplete the questions below using mental methods. 7050 + 60 = 7110 6288 + 40 = 6328 2985 + 50 = 3035 1998 + 70 = 2068

116. Count back in tens from a four-digit numberFor the questions below, write the next seven numbers, counting back in tens. 5465, 5455, 5445,

6044, 6034, 6024,

117. Subtract a multiple of 10 from a four-digit numberComplete the questions below using mental methods. 3595 – 50 = 3545 2312 – 40 = 2272 7005 – 70 = 6935 1044 – 80 = 964

6096 6097 6098 6099 6100 6101 6102

4999 5000 5001 5002 5003 5004 5005

3102 3101 3100 3099 3098 3097 3096

2003 2002 2001 2000 1999 1998 1997

4775 4785 4795 4805 4815 4825 4835

7372 7382 7392 7402 7412 7422 7432

5435 5425 5415 5405 5395 5385 5375

6014 6004 5994 5984 5974 5964 5954

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118. Add two multiples of 100 beyond 1000Complete the questions below using mental methods. 700 + 500 = 1200 900 + 800 = 1700 2500 + 500 = 3000 4700 + 800 = 5500

119. Count on in hundreds from a four-digit numberFor the questions below, write the next seven numbers, counting on in hundreds. 5355, 5455, 5555,

4820, 4720, 4620,

120. Add a multiple of 100 to a four-digit numberComplete the questions below using mental methods. 3333 + 500 = 3833 4830 + 500 = 5330 6655 + 800 = 7455 2999 + 700 = 3699

121. Subtract a multiple of 100 from a four-digit multiple of 1005500 – 400 = 5100 1700 – 900 = 800 2300 – 700 = 1600 7300 – 800 = 6500

122. Count back in hundreds from a four-digit numberFor the questions below, write the next seven numbers, counting back in hundreds. 1766, 1666, 1566,

6466, 6366, 6266,

123. Subtract a multiple of 100 from a four-digit number1303 – 500 = 803 2660 – 600 = 2060 6222 – 700 = 5522 7330 – 900 = 6430

124. Add and subtract a multiple of 1000 from a four-digit number2749 + 6000 = 8749 4959 + 3000 = 7959 6440 – 6000 = 440 9437 – 4000 = 5437

125. Subtract mentally by finding the difference, targeting the ten, hundred or thousand

Complete the questions below by finding the difference, targeting the ten, hundred or thousand. 3006 – 2797 = 209 5000 – 4546 = 454 3004 – 2970 = 34 5200 – 4958 = 242

5655 5755 5855 5955 6055 6155 6255

4520 4420 4320 4220 4120 4020 3920

1466 1366 1266 1166 1066 966 866

6166 6066 5966 5866 5766 5666 5566

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126. Add four-digit numbers using column additionComplete the questions below using column addition. 5976 + 68 = 6044 5555 + 918 = 6473 769 + 652 = 1421 4844 + 4188 = 9032

127. Subtract four-digit numbers using column subtractionComplete the questions below using column subtraction. 6558 – 69 = 6489 3312 – 158 = 3154 8266 – 1491 = 6775 6520 – 5558 = 962

128. Exchange across zero to subtract four-digit numbers using column subtraction8008 – 66 = 7942 5004 – 885 = 4119 6006 – 4374 = 1632 7000 – 4727 = 2273

129. Solve missing number problems for addition and subtraction with four-digit numbers


= 4965 + 3915 + 4535 = 9372

7528 – = 2694 – 2638 = 2828

130. Round to the nearest 1000Round the numbers below to the nearest 1000. 5293 ≈ 5000 3288 ≈ 3000 6919 ≈ 7000 6884 ≈ 7000

131. Round to the nearest 1000, 100 and 10Round the numbers below. 3 6 3 7

Nearest 10 ≈

Nearest 100 ≈

Nearest 1000 ≈

1 4 5 4

Nearest 10 ≈

Nearest 100 ≈

Nearest 1000 ≈

4 7 9 6

Nearest 10 ≈

Nearest 100 ≈

Nearest 1000 ≈

132. Check answers using the inverse operation with four-digit numbersCheck the answers to these calculations by using the inverse operation. 2794 + 1254 = 40484048 – 1254 = 2794 or 4048 – 2794 = 1254

8102 – 3456 = 46464646 + 3456 = 8102 or 3456 + 4646 = 8102

48378880

54664834

4000

3600

3640

1000

1500

1450

5000

4800

4800

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133. Write numbers up to one million in digitsWrite the numbers below in digits. Two hundred and ten thousand, two hundred and one

Three hundred thousand, three hundred and three

Eight hundred and eight thousand Five hundred and fifty thousand and fifty

134. Write numbers up to one million in wordsWrite the numbers below in words. 271,207 Two hundred and seventy-one thousand, two hundred and seven

384,000 Three hundred and eighty-four thousand

800,080 Eight hundred thousand and eighty

210,900 Two hundred and ten thousand, nine hundred

135. Identify the digit in each place value for six-digit numbersFor the questions below, write the digit of each place value. 573,218

Hundred-thousands:

Ten-thousands:

Thousands:

Hundreds:

Tens:

Ones:

643,752

Hundreds:

Hundred-thousands:

Ten-thousands:

Ones:

Thousands:

Tens:

297,138

Ten-thousands:

Tens:

Ones:

Hundred-thousands:

Thousands:

Hundreds:

136. Identify the value of each digit in six-digit numbersFor the questions below, write the value of each digit. 45,602

4 represents:

5 represents:

6 represents:

0 represents:

2 represents:

528,937

9 represents:

8 represents:

7 represents:

5 represents:

3 represents:

2 represents:

409,375

0 represents:

3 represents:

4 represents:

5 represents:

7 represents:

9 represents:

210 201

808 000

300 303

550 050

5

7

3

2

4

6

8

5

1

2

3

7

1

9

7

2

8

3

40 000

20 000

2

0

600

5 000

900

30

500 000

7

8 000

9 000

0

70

5

400 000

300

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137. Partition six-digit numbersPartition the numbers below.

80627 = + + +

755766 = + + + + +

626026 = + + + +

138. Compare numbers with up to six digitsWrite > or < in each box.

464646 644444 200000 99999 696222 669666

458458 485459 265526 265656 66000 600000

139. Order numbers with up to six digitsOrder each set of numbers from smallest to largest. 660 000, 60 900, 690 000, 9 600, 669 000

45 555, 540 444, 54 444, 545 555, 554 444

140. Round to the nearest 10 000, 1 000, 100 or 10For the questions below, round each number to the specified degree of accuracy. 351,454Round to the nearest…

Hundred thousand:

Ten thousand:

Thousand:

Hundred:

Ten:

160,165Round to the nearest…

Hundred thousand:

Ten thousand:

Thousand:

Hundred:

Ten:

656,606Round to the nearest…

Hundred thousand:

Ten thousand:

Thousand:

Hundred:

Ten:

80 000 600 20 7

700 000 50 000 5 000 700 60 6

600 000 20 000 6 000 20 6

< > >

< < <

9 600 60 900 660 000 669 000 690 000

45 555 54 444 540 444 545 555 554 444

400 000

351 450

351 500

351 000

350 000

200 000

160 170

162 200

160 000

160 000

700 000

656 610

656 600

657 000

660 000

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141. Count on in hundreds from a six-digit numberFor the questions below, write the next seven numbers, counting in hundreds. 59308, 59408, 59508,

299599, 299699, 299799,

142. Add a multiple of 100 to a six-digit numberComplete the questions below using mental methods. 6055 + 800 = 6 855

38850 + 500 = 39 350

469705 + 800 = 470 505

899411 + 600 = 900 011

143. Count back in hundreds from a six-digit numberFor the questions below, write the next seven numbers, counting back in hundreds. 100533, 100433, 100333,

234322, 234222, 234122,

144. Subtract a multiple of 100 from a six-digit numberComplete the questions below using mental methods. 22922 – 700 = 22 222

10395 – 500 = 9 895

313131 – 600 = 312 531

100522 – 600 = 99 922

145. Count on in thousands from a six-digit numberFor the questions below, write the next seven numbers, counting in thousands. 93444, 94444, 95444,

694400, 695400, 696400,

146. Add a multiple of 1000 to a six-digit numberComplete the questions below using mental methods. 25800 + 5000 = 30 800

97900 + 6000 = 103 900

585585 + 7000 =592 585

399933 + 8000 = 407 933

147. Count back in thousands from a six-digit numberFor the questions below, write the next seven numbers, counting back in thousands. 104450, 103450, 102450,

465333, 464333, 463333,

148. Subtract a multiple of 1000 from a six-digit numberComplete the questions below using mental methods. 39393 – 3000 = 36 393

451900 – 5000 = 446 900

275755 – 6000 = 269 755

300300 – 7000 = 293 300

59608 59708 59808 59909 60008 60108 60208

299899 299999 300099 300199 300299 300399 300499

100233 100133 100033 99933 99833 99733 99633

234022 233922 233822 233722 233622 233522 233422

96444 97444 98444 99444 100444 101444 102444

697400 698400 699400 700400 701400 702400 703400

101450 100450 99450 98450 97450 96450 95450

462333 461333 460333 459333 458333 457333 456333

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149. Count on in steps of 10 000 from a six-digit numberFor the questions below, write the next seven numbers, counting in ten-thousands. 73300, 83300, 93300,

678000, 688000, 698000,

150. Add a multiple of 10 000 to a six-digit numberComplete the questions below using mental methods. 77000 + 70000 = 147 000 675000 + 50000 = 725 000 464600 + 60000 = 524 600

151. Count back in steps of 10 000 from a six-digit numberFor the questions below, write the next seven numbers, counting back in ten-thousands. 146600, 136600, 126600,

835900, 825900, 815900,

152. Subtract a multiple of 10 000 from a six-digit numberComplete the questions below using mental methods. 199000 – 90000 = 109 000 343434 – 70000 = 273 434 646004 – 80000 = 566 004

153. Add a multiple of 100 000 to a six-digit number50000 + 500000 = 550 000 150000 + 600000 = 750 000 343400 + 400000 = 743 400

154. Subtract a multiple of 100 000 from a six-digit number777000 – 700000 = 77 000 550000 – 300000 = 250 000 750000 – 200000 = 550 000

155. Solve missing number addition problems with six-digit numbers mentallyComplete the questions below by finding the missing numbers. 59500 + = 62500

195500 + = 215500

330003 + = 630003

399770 + = 400470

156. Solve missing number subtraction problems with six-digit numbers mentally 31450 – = 30950

550500 – = 50500

333300 – = 273300

602020 – = 599020

103300 113300 123300 133300 143300 153300 163300

708000 718000 728000 738000 748000 758000 768000

116600 106600 96600 86600 76600 66600 56600

805900 795900 785900 775900 765900 755900 745900

3 000 20 000

300 000 600

500

60 000 3 000

500 000

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157. Add large numbers using column additionComplete the questions below using column addition. 7873 + 7575 = 15 448

54967 + 50963 = 105 930

214892 + 88122 = 303 014

376857 + 192754 = 569 611

158. Subtract large numbers using column subtractionComplete the questions below using column subtraction. 11711 – 2188 = 9 523

124242 – 44638 = 79 604

112269 – 86362 = 25 907

576191 – 267548 = 308 643

159. Exchange across zero to subtract large numbers using column subtraction10009 – 6525 = 3 484

123004 – 50018 = 72 986

706002 – 19538 = 686 464

645000 – 337457 = 307 543

160. Solve missing number problems for addition and subtraction with large numbersComplete the questions below by finding the missing numbers.

= 474733 + 216793 + 58392 = 292020

861790 – = 147277 – 57923 = 368156

161. Solve missing digit addition problemsComplete the addition questions below by finding the missing digits.

162. Solve missing digit subtraction problemsComplete the subtraction questions below by finding the missing digits.

138 485

426 079714 513

691 526

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163. Write numbers to 100 in Roman numeralsWrite the numbers below in Roman numerals. 26 = XXVI 63 = LXIII 36 = XXXVI 94 = XCIV 49 = XLIX

77 = LXXVII 28 = XXVIII 82 = LXXXII 54 = LIV 45 = XLV

164. Read Roman numerals to 100Write the numbers represented by Roman numerals below. VI = 6 IX = 9 XV = 15 XXVIII = 28 XXXVI = 36

XXXVIII = 38 XLII = 42 XLV = 45 LI = 51 LIV = 54

LXIX = 69 LXXIV = 74 LXXXI = 81 XCVII = 97 XCIX = 99

165. Write numbers to 1000 in Roman numeralsWrite the numbers below in Roman numerals. 133 = CXXXIII 244 = CCXLIV 301 = CCCI 449 = CDXLIX 505 = DV

560 = DLX 648 = DCXLVIII 792 = DCCXCII 870 = DCCCLXX 972 = CMLXXII

166. Read Roman numerals to 1000Write the numbers represented by Roman numerals below. CIV = 104 CCXXVIII = 228 CCCXLV = 345 CCCLXXXVI = 386 CCCXCIX = 399

CDIII = 403 CDXC = 490 DXLI = 541 DCIV = 604 DCXL = 640

DCLXVI = 666 DCCXCVII = 797 DCCCX = 810 CML = 950 CMLXXXIV = 984

167. Subtract to make a negative answer5 – 9 = -4 4 – 5 = -1 1 – 6 = -5

168. Add to a negative number-3 + 7 = 4 -2 + 8 = 6 -7 + 8 = 1

169. Complete number sequences involving negative numbersFor the questions below, write the next numbers in each sequence. -11, -9, -7,

8, 5, 2,

-12, -9, -6,

170. Subtract to make a negative answer with larger numbers39 – 85 = -46 8 – 89 = -81 58 – 64 = -6

171. Add to a negative number with larger numbers-32 + 53 = 21 -7 + 67 = 60 -84 + 22 = -62

-5 -3 -1 1 3 5 7

1 0 -2 -4 -6 -8 -10

-3 0 3 6 9 12

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172. Write numbers up to 10 million in digitsWrite the numbers below in digits. Four million, seven hundred and twenty thousand and twenty

Four million, fifty thousand and eighty

Five million, three thousand and five Three million, two hundred thousand and twelve

173. Write numbers up to 10 million in wordsWrite the numbers below in words. 3,203,567 Three million, two hundred and three thousand, five hundred and sixty-seven

6,210,000 Six million, two hundred and ten thousand

5,050,050 Five million, fifty thousand and fifty

3,000,080 Three million and eighty

174. Identify the digit in each place value for seven-digit numbersFor the questions below, write the digit of each place value. 2,447,891

Millions:

Hundred thousands:

Ten thousands:

Thousands:

Hundreds:

Tens:

Ones:

2,896,051

Hundred thousands:

Tens:

Millions:

Thousands:

Ones:

Ten thousands:

Hundreds:

1,471,380

Ones:

Hundreds:

Hundred thousands:

Thousands:

Ten thousands:

Millions:

Tens:

175. Identify the value of each digit in seven-digit numbersFor the questions below, write the value of each digit. 7,035,690

7 represents:

3 represents:

5 represents:

6 represents:

9 represents:

4,802,695

6 represents:

2 represents:

5 represents:

4 represents:

9 represents:

8 represents:

1,279,068

2 represents:

9 represents:

1 represents:

8 represents:

6 represents:

7 represents:

4 720 020

5 003 005

4 050 080

2 200 012

9

8

1

6

2

5

0

9

2

8

7

4

4

1

1

0

7

1

4

3

8

7 000 000

800 000

90

600

5 000

30 000

600

90

4 000 000

5

2 000

70 000

200 000

60

8

1 000 000

9 000

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176. Partition seven-digit numbersPartition the numbers below.

6,609,012 = + + + +

5,265,263 = + + + + + +

7,280,989 = + + + + +

177. Order numbers with up to seven digitsOrder each set of numbers from smallest to largest. 500 000, 54 000, 4 055 000, 4 500 000, 4 504 000

9 090, 8 090 000, 9 800 000, 900 000, 8 800 000

178. Round to the nearest 10, 100, 1000, 10 000, 100 000 and 1 000 000For the questions below, round each number to the specified degree of accuracy. 6,901,098Round to the nearest…

Million:

Hundred thousand:

Ten thousand:

Thousand:

Hundred:

Ten:

1,208,917Round to the nearest…

Million:

Hundred thousand:

Ten thousand:

Thousand:

Hundred:

Ten:

3,106,307Round to the nearest…

Million:

Hundred thousand:

Ten thousand:

Thousand:

Hundred:

Ten:

6 000 000 600 000 9 000 10 2

5 000 000 200 000 60 000 5 000 200 60

7 000 000 200 000 80 000 900 80 9

3

54 000 500 000 4 055 000 4 500 000 4 504 000

9 090 900 000 8 090 000 8 800 000 9 800 000

6900000

6901100

6901100

6901000

6900000

7000000

1200000

1298920

1208900

1209000

1210000

1000000

3100000

3106310

3106300

3106000

3110000

3000000

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