Subtraction Of Whole Numbers Using An Expanded Method

(the last step towards using a standard written method for subtraction)

For more maths help & free games related to this, visit: www.makemymathsbetter.com

Part 4 of 5: Subtraction with adjustment from the tens and the hundreds.

Subtraction Of Whole Numbers Using An Expanded Method

(the last step towards using a standard written method for subtraction)

For more maths help & free games related to this, visit: www.makemymathsbetter.com

Part 4 of 5: Subtraction with adjustment from the tens and the hundreds.

It is important that you have already viewed and understood parts 1, 2 & 3 before you go any further.

In some subtraction questions both the tens and the units digits to be subtracted are bigger than both the tens and the units digits you are subtracting from, for example: 645 - 378.

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5

8_

In some subtraction questions both the tens and the units digits to be subtracted are bigger than both the tens and the units digits you are subtracting from, for example: 645 - 378.An adjustment will first need to be made from the tens

600

300

40

70

5

8_

30

In some subtraction questions both the tens and the units digits to be subtracted are bigger than both the tens and the units digits you are subtracting from, for example: 645 - 378.An adjustment will first need to be made from the tens to the units

600

300

40

70

5

8_

30 15

In some subtraction questions both the tens and the units digits to be subtracted are bigger than both the tens and the units digits you are subtracting from, for example: 645 - 378.An adjustment will first need to be made from the tens to the units. The units can then be subtracted:

600

300

40

70

5

8_

30 15

7

In some subtraction questions both the tens and the units digits to be subtracted are bigger than both the tens and the units digits you are subtracting from, for example: 645 - 378.An adjustment then needs to be made from the hundreds

600

300

40

70

5

8_

30 15 500

7

In some subtraction questions both the tens and the units digits to be subtracted are bigger than both the tens and the units digits you are subtracting from, for example: 645 - 378.An adjustment then needs to be made from the hundreds to the tens

600

300

40

70

5

8_

30 15 130

500

7

In some subtraction questions both the tens and the units digits to be subtracted are bigger than both the tens and the units digits you are subtracting from, for example: 645 - 378.An adjustment then needs to be made from the hundreds to the tens. The tens can then be subtracted:

600

300

40

70

5

8_

30 15 130

500

760

In some subtraction questions both the tens and the units digits to be subtracted are bigger than both the tens and the units digits you are subtracting from, for example: 645 - 378.Finally subtract the hundreds:

600

300

40

70

5

8_

30 15 130

500

760200

In some subtraction questions both the tens and the units digits to be subtracted are bigger than both the tens and the units digits you are subtracting from, for example: 645 - 378.

600

300

40

70

5

8_

30 15 130

500

760200

Then add the numbers together to find the answer

+ + = 267

In some subtraction questions both the tens and the units digits to be subtracted are bigger than both the tens and the units digits you are subtracting from, for example: 645 - 378.

When this can be performed confidently, it can be simplified to a standard written method:

600

300

40

70

5

8_

30 15 130

500

760200 + + = 267

3 7 8_

6 4 5

In some subtraction questions both the tens and the units digits to be subtracted are bigger than both the tens and the units digits you are subtracting from, for example: 645 - 378.

When this can be performed confidently, it can be simplified to a standard written method:

600

300

40

70

5

8_

30 15 130

500

760200 + + = 267

3 7 8_

3

6 4 5

Firstly an adjustment is made from the tens

In some subtraction questions both the tens and the units digits to be subtracted are bigger than both the tens and the units digits you are subtracting from, for example: 645 - 378.

When this can be performed confidently, it can be simplified to a standard written method:

600

300

40

70

5

8_

30 15 130

500

760200 + + = 267

3 7 8_

3 15

6 4 5

Firstly an adjustment is made from the tens to the units.

In some subtraction questions both the tens and the units digits to be subtracted are bigger than both the tens and the units digits you are subtracting from, for example: 645 - 378.

When this can be performed confidently, it can be simplified to a standard written method:

600

300

40

70

5

8_

30 15 130

500

760200 + + = 267

7

3 7 8_

3 15

6 4 5

Firstly an adjustment is made from the tens to the units. Then, the units are subtracted

In some subtraction questions both the tens and the units digits to be subtracted are bigger than both the tens and the units digits you are subtracting from, for example: 645 - 378.

When this can be performed confidently, it can be simplified to a standard written method:

600

300

40

70

5

8_

30 15 130

500

760200 + + = 267

7

3 7 8_

6 4 55 3 15

Next, an adjustment is made from the hundreds

In some subtraction questions both the tens and the units digits to be subtracted are bigger than both the tens and the units digits you are subtracting from, for example: 645 - 378.

When this can be performed confidently, it can be simplified to a standard written method:

600

300

40

70

5

8_

30 15 130

500

760200 + + = 267

7

3 7 8_

6 4 55 3 15

13 Next, an adjustment is made from the hundreds to the tens

In some subtraction questions both the tens and the units digits to be subtracted are bigger than both the tens and the units digits you are subtracting from, for example: 645 - 378.

When this can be performed confidently, it can be simplified to a standard written method:

600

300

40

70

5

8_

30 15 130

500

760200 + + = 267

6 7

3 7 8_

6 4 55 3 15

13 Next, an adjustment is made from the hundreds to the tens. The tens are then subtracted.

In some subtraction questions both the tens and the units digits to be subtracted are bigger than both the tens and the units digits you are subtracting from, for example: 645 - 378.

When this can be performed confidently, it can be simplified to a standard written method:

600

300

40

70

5

8_

30 15 130

500

760200 + + = 267

2 6 7

3 7 8_

6 4 55 3 15

13 Finally the hundreds are subtracted.

That’s it for now......

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