adding. 1 5 6 +2 3 2 3 0 01 0 0 + 200 5 0 + 3 08 0 6 + 28 3 8 8 adding by partitioning vertically
TRANSCRIPT
Adding
1 5 6
+ 2 3 2
3 0 0 1 0 0 + 200
5 0 + 3 08 0
6 + 28
3 8 8
Adding by Partitioning Vertically
2 3 7 8
+ 1 1 4 9
3 0 0 0
4 0 0
1 1 0
3 5 2 7
1 7
2 3 7 8
+ 1 1 4 9
7
1
2
1
53
Partitioning Vertically
Formal WrittenMethod
4 5 7 8
+ 2 3 4 9
6 0 0 0
8 0 0
1 1 0
6 9 2 7
1 7
4 5 7 8
+ 2 3 4 9
7
1
2
1
96
Partitioning Vertically
Formal WrittenMethod
4 6 8 7
+ 5 7 4 9
9 0 0 0
1 3 0 0
1 2 0
1 0 4 3 6
1 6
4 6 8 7
+ 5 7 4 9
6
1
3
1
Partitioning Vertically
Formal WrittenMethod
4
1
1 0
Subtracting
Subtraction by adding on.
502 - 198
198
+2
200 500
+300
502
+2
= 304
502- 198
2 (to 200)
300 (to 500)
(to 502)2
304
Subtraction by adding on.
613 - 279
279
+1
280 300
+20
600
+300
= 334
613- 279
1 (to 280)20 (to 300)
(to 600)300
334
+13
613
13 (to 613)
Subtraction by adding on.
846 - 458
458
+42
500 800
+300
846
+46
= 388
846- 458
42 (to 500)300 (to 800)
(to 846)46
388
Subtraction by adding on.
2645 - 898
898
+2
900 1000
+100
2000
+1000
= 1746
2645- 898
2 (to 900)100 (to 1000)
(to 2000)1000
1746
+645
2645
645 (to 2645)
Subtraction by adding on.
3567 - 742
742
+58
800 1000
+200
3000
+2000
= 2825
3567- 742
58 (to 800)200 (to 1000)
(to 3000)2000
2825
+567
3567
567 (to 3567)
Subtraction by adding on.
3879 - 1352
1352
+48
1400 2000
+600
3000
+1000
= 2525
3879- 1352
48 (to 1400)600 (to 2000)
(to 3000)1000
+879
3879
879 (to 3879)5
1
2
1
5
1
2
Subtraction by adding on.
6457 - 2469
2469
+31
2500 3000
+500
6000
+3000
= 3988
6457- 2469
31 (to 2500)500 (to 3000)
(to 6000)3000
+457
6457
457 (to 6457)8
8
9
3
Subtraction by adding on.
5021 - 1989
1989
+1
1990 2000
+10
3000
+1000
4000
+1000
5000
+1000
= 3032
3000 30 2
Th H T U
+20
5020
+1
5021
Subtraction by adding on vertically
6008- 2997
3 (3000)
3000 (6000)
(6008)8
3011
Subtraction by adding on vertically
5003- 1989
11 (2000)
3000 (5000)
(6008)3
3014
5 2 3 9- 1 5 6 7
3 (1570)
3 0 (1600)
(2000) 4 0 0
3 2 3 9 (5239)
3
1
563
5 2 3 9- 1 5 6 7
2
11
7
4 1
63
Adding Decimals
6 5 . 4
+ 3 9 . 3
. 7
1 4 . 0
9 0 . 0
1 0 4 . 7
6 5 . 4
+ 3 9 . 3
74
1
.1 0
Partitioning Vertically
Formal WrittenMethod
2 8 . 7
+ 3 9 . 3
1 . 0
1 7 . 0
5 0 . 0
6 8 . 0
2 8 . 7
+ 3 9 . 3
8
1
.5
Partitioning Vertically
Formal WrittenMethod
0
1
2 8 . 7
+ 4 7 . 8
1 . 5
1 5 . 0
6 0 . 0
7 6 . 5
2 8 . 7
+ 4 7 . 8
6
1
.7
Partitioning Vertically
Formal WrittenMethod
5
1
2 8 . 7
+
4 7 . 8
Partitioning Vertically
5 3 . 6
2 . 1
1 8 . 0
1 1 0 . 0
1.0
1
3
1
Formal WrittenMethod
2 8 . 7
+
4 7 . 8
5 3 . 6
. 1 2
0 2
1 3
3.12
+ 2.32
.04
.40
5.00
5.44
Adding by Partitioning Vertically
5 . 9 1
+ 1 . 8 6
. 0 7
1 . 7 0
6 . 0 0
7 . 7 7
5 . 9 1
+ 1 . 8 6
77
1
.7
Partitioning Vertically
Formal WrittenMethod
4 . 3 7
+ 2 . 5 6
. 2 2
1 . 6 0
9 . 0 0
1 0 . 8 2
4 . 3 7
+ 2 . 5 6
2
2
.1 0
Partitioning Vertically
Formal WrittenMethod
3 . 8 9
3 . 8 9
8
1
Subtracting Decimals
0 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9 1.0
Decimals
Subtraction by adding on.
24.3 - 7.9
7.9
+0.1
8.0 10.0
+2.0
20.0
+10.0
= 16.4
24.3- 7.9
0.1 (to 8.0)2.0 (to 10.0)
(to 20.0)10.0
.4
+4.3
24.3
4.3 (to 24.3)
61
Subtraction by adding on.
36.8 - 8.7
8.7
+0.3
9.0 10.0
+1.0
30.0
+20.0
= 28.1
36.8 - 8.7
0.3 (to 9.0)1.0 (to 10.0)
(to 30.0)20.0
+6.8
36.8
6.8 (to 36.8)
.1
1
8
2
Subtraction by adding on.
42.8 - 19.3
19.3
+0.7
20.0 30.0
+10.0
40.0
+10.0
= 23.5
42.8 - 19.3
0.7 (to 20.0)10.0 (to 30.0)
(to 40.0)10.0
+2.8
42.8
2.8 (to 42.8)
.5
1
3
2
Subtraction by adding on.
56.9 - 23.6
23.6
+0.4
24.0 30.0
+6.0
50.0
+20.0
= 33.3
56.9 - 23.6
0.4 (to 24.0)6.0 (to 30.0)
(to 50.0)20.0
+6.9
56.9
6.9 (to 56.9)
.3
1
3
3
1
0 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9 1.0
Decimals
Subtraction by adding on.
£7.85 - £3.49
3.49
+0.51
4.0 7.0
+3.0
7.85
+0.85
= £4.36
£7.85- £3.49
0.51 (to £4.00)3.00 (to £7.00)
(to £7.85)0.85
6
£4
.3
1
Subtraction by adding on.
£9.63 - £5.28
5.28
+0.72
6.0 9.0
+3.0
9.63
+0.63
= £4.35
£9.63- £5.28
0.72 (to £6.00)3.00 (to £9.00)
(to £9.63)0.63
5
£4
.3
1
Subtraction by adding on.
£12.51 - £7.83
7.83
+0.17
8.0 12.0
+4.0
12.51
+0.51
= £4.68
£12.51- £7.83
0.17 (to £8.00)4.00 (to £12.00)
(to £12.51)0.51
8
£4
.6
Subtraction by adding on.
£23.94 - £17.62
17.62
+0.38
18.0 20.0
+2.0
23.0
+3.0
= £6.32
£23.94 - £17.62
0.38 (to £18.0)2.00 (to £20.0)
(to £23.0)3.00
+0.94
23.94
0.94 (to £23.94)
2
1
£6
.3
1
Subtraction by adding on.
£35.12 - £27.59
27.59
+0.41
28.0 30.0
+2.0
35.0
+5.0
= £7.53
£35.12 - £27.59
0.41 (to £28.00)2.00 (to £30.00)
(to £35.00)5.00
+0.12
23.94
0.12 (to £35.12)
3
£7
.5