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 3 of 5: Subtraction with adjustment from the tens.

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 3 of 5: Subtraction with adjustment from the tens.It is important that you have already viewed and understood parts 1 & 2

before you go any further.

When subtracting, there will be times when the units in the bigger number are smaller than the units in the smaller number, e.g. 475 – 229

400

200

70

20

5

9_

When subtracting, there will be times when the units in the bigger number are smaller than the units in the smaller number, e.g. 475 – 229When this happens, an adjustment is made from the tens to the units.

400

200

70

20

5

9_

When subtracting, there will be times when the units in the bigger number are smaller than the units in the smaller number, e.g. 475 – 229When this happens, an adjustment is made from the tens to the units. A ten is effectively taken from the tens column.

400

200

70

20

5

9_

60

When subtracting, there will be times when the units in the bigger number are smaller than the units in the smaller number, e.g. 475 – 229When this happens, an adjustment is made from the tens to the units. A ten is effectively taken from the tens column.And added to the units column.

400

200

70

20

5

9_

60 15

When subtracting, there will be times when the units in the bigger number are smaller than the units in the smaller number, e.g. 475 – 229When this happens, an adjustment is made from the tens to the units. A ten is effectively taken from the tens column.And added to the units column.

400

200

70

20

5

9_

60The calculation can then be carried out:

15

When subtracting, there will be times when the units in the bigger number are smaller than the units in the smaller number, e.g. 475 – 229When this happens, an adjustment is made from the tens to the units. A ten is effectively taken from the tens column.And added to the units column.

400

200

70

20

5

9_

6

60 15

Firstly, subtract the units.

When subtracting, there will be times when the units in the bigger number are smaller than the units in the smaller number, e.g. 475 – 229When this happens, an adjustment is made from the tens to the units. A ten is effectively taken from the tens column.And added to the units column.

400

200

70

20

5

9_

640

60 15

Followed by the tens

When subtracting, there will be times when the units in the bigger number are smaller than the units in the smaller number, e.g. 475 – 229When this happens, an adjustment is made from the tens to the units. A ten is effectively taken from the tens column.And added to the units column.

400

200

70

20

5

9_

640200

60

And finishing with the hundreds:

15

When subtracting, there will be times when the units in the bigger number are smaller than the units in the smaller number, e.g. 475 – 229When this happens, an adjustment is made from the tens to the units. A ten is effectively taken from the tens column.And added to the units column.

400

200

70

20

5

9_

640200 + + = 246

60 15

The 3 answers are then added together to give the final answer

When subtracting, there will be times when the units in the bigger number are smaller than the units in the smaller number, e.g. 475 – 229When this happens, an adjustment is made from the tens to the units. A ten is effectively taken from the tens column.And added to the units column.

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

400

200

70

20

5

9_

640200 + + = 246

60

4 7 5

2 2 9_

15

When subtracting, there will be times when the units in the bigger number are smaller than the units in the smaller number, e.g. 475 – 229When this happens, an adjustment is made from the tens to the units. A ten is effectively taken from the tens column.And added to the units column.

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

400

200

70

20

5

9_

640200 + + = 246

60

4 7 5

2 2 9_

6

15

Firstly, an adjustment is made from the tens

When subtracting, there will be times when the units in the bigger number are smaller than the units in the smaller number, e.g. 475 – 229When this happens, an adjustment is made from the tens to the units. A ten is effectively taken from the tens column.And added to the units column.

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

400

200

70

20

5

9_

640200 + + = 246

60

4 7 5

2 2 9_

156

15

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

When subtracting, there will be times when the units in the bigger number are smaller than the units in the smaller number, e.g. 475 – 229When this happens, an adjustment is made from the tens to the units. A ten is effectively taken from the tens column.And added to the units column.

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

400

200

70

20

5

9_

640200 + + = 246

60

4 7 5

2 2 9_

6

156

15

Then subtract the units

When subtracting, there will be times when the units in the bigger number are smaller than the units in the smaller number, e.g. 475 – 229When this happens, an adjustment is made from the tens to the units. A ten is effectively taken from the tens column.And added to the units column.

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

400

200

70

20

5

9_

640200 + + = 246

60

4 7 5

2 2 9_

4 6

156

15

Followed by the tens

When subtracting, there will be times when the units in the bigger number are smaller than the units in the smaller number, e.g. 475 – 229When this happens, an adjustment is made from the tens to the units. A ten is effectively taken from the tens column.And added to the units column.

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

400

200

70

20

5

9_

640200 + + = 246

60

4 7 5

2 2 9_

2 4 6

156

15

And finally the hundreds

That’s it for now......

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