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 2 of 5: Subtraction with adjustment from 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 2 of 5: Subtraction with adjustment from the hundreds.It is important that you have already viewed and understood part 1

before you go any further.

When subtracting, the tens in the bigger number is sometimes smaller than the tens in the smaller number, e.g. 436 – 285

400

200

30

80

6

5_

When subtracting, the tens in the bigger number is sometimes smaller than the tens in the smaller number, e.g. 436 – 285When this happens, an adjustment is made from the hundreds to the tens.

400

200

30

80

6

5_

When subtracting, the tens in the bigger number is sometimes smaller than the tens in the smaller number, e.g. 436 – 285When this happens, an adjustment is made from the hundreds to the tens. A hundred is effectively taken from the hundreds column.

400

200

30

80

6

5_

300

When subtracting, the tens in the bigger number is sometimes smaller than the tens in the smaller number, e.g. 436 – 285When this happens, an adjustment is made from the hundreds to the tens. A hundred is effectively taken from the hundreds column.And added to the tens column.

400

200

130

80

6

5_

300

When subtracting, the tens in the bigger number is sometimes smaller than the tens in the smaller number, e.g. 436 – 285When this happens, an adjustment is made from the hundreds to the tens. A hundred is effectively taken from the hundreds column.And added to the tens column.

400

200

130

80

6

5_

1

300The units should then be subtracted.

When subtracting, the tens in the bigger number is sometimes smaller than the tens in the smaller number, e.g. 436 – 285When this happens, an adjustment is made from the hundreds to the tens. A hundred is effectively taken from the hundreds column.And added to the tens column.

400

200

130

80

6

5_

150

300

Followed by the tens

When subtracting, the tens in the bigger number is sometimes smaller than the tens in the smaller number, e.g. 436 – 285When this happens, an adjustment is made from the hundreds to the tens. A hundred is effectively taken from the hundreds column.And added to the tens column.

400

200

130

80

6

5_

150100

300

Then the hundreds

When subtracting, the tens in the bigger number is sometimes smaller than the tens in the smaller number, e.g. 436 – 285When this happens, an adjustment is made from the hundreds to the tens. A hundred is effectively taken from the hundreds column.And added to the tens column.

400

200

130

80

6

5_

150100 + + = 151

300

Finally, add the numbers together to find the total

When subtracting, the tens in the bigger number is sometimes smaller than the tens in the smaller number, e.g. 436 – 285When this happens, an adjustment is made from the hundreds to the tens. A hundred is effectively taken from the hundreds column.And added to the tens column.

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

400

200

130

80

6

5_

150100 + + = 151

300

4 3 6

2 8 5_

When subtracting, the tens in the bigger number is sometimes smaller than the tens in the smaller number, e.g. 436 – 285When this happens, an adjustment is made from the hundreds to the tens. A hundred is effectively taken from the hundreds column.And added to the tens column.

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

400

200

130

80

6

5_

150100 + + = 151

300

4 3 6

2 8 5_

1 Start with the units

When subtracting, the tens in the bigger number is sometimes smaller than the tens in the smaller number, e.g. 436 – 285When this happens, an adjustment is made from the hundreds to the tens. A hundred is effectively taken from the hundreds column.And added to the tens column.

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

400

200

130

80

6

5_

150100 + + = 151

300

4 3 6

2 8 5_

1 Start with the units

When subtracting, the tens in the bigger number is sometimes smaller than the tens in the smaller number, e.g. 436 – 285When this happens, an adjustment is made from the hundreds to the tens. A hundred is effectively taken from the hundreds column.And added to the tens column.

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

400

200

130

80

6

5_

150100 + + = 151

300

4 3 6

2 8 5_

1 Then make an adjustment from the hundreds

When subtracting, the tens in the bigger number is sometimes smaller than the tens in the smaller number, e.g. 436 – 285When this happens, an adjustment is made from the hundreds to the tens. A hundred is effectively taken from the hundreds column.And added to the tens column.

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

400

200

130

80

6

5_

150100 + + = 151

300

4 3 6

2 8 5_

1

3

Then make an adjustment from the hundreds

When subtracting, the tens in the bigger number is sometimes smaller than the tens in the smaller number, e.g. 436 – 285When this happens, an adjustment is made from the hundreds to the tens. A hundred is effectively taken from the hundreds column.And added to the tens column.

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

400

200

130

80

6

5_

150100 + + = 151

300

4 3 6

2 8 5_

1

3

Then make an adjustment from the hundreds to the tens

When subtracting, the tens in the bigger number is sometimes smaller than the tens in the smaller number, e.g. 436 – 285When this happens, an adjustment is made from the hundreds to the tens. A hundred is effectively taken from the hundreds column.And added to the tens column.

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

400

200

130

80

6

5_

150100 + + = 151

300

4 3 6

2 8 5_

1

3 13

Then make an adjustment from the hundreds to the tens

When subtracting, the tens in the bigger number is sometimes smaller than the tens in the smaller number, e.g. 436 – 285When this happens, an adjustment is made from the hundreds to the tens. A hundred is effectively taken from the hundreds column.And added to the tens column.

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

400

200

130

80

6

5_

150100 + + = 151

300

4 3 6

2 8 5_

5 1

3 13

Then, subtract the tens

When subtracting, the tens in the bigger number is sometimes smaller than the tens in the smaller number, e.g. 436 – 285When this happens, an adjustment is made from the hundreds to the tens. A hundred is effectively taken from the hundreds column.And added to the tens column.

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

400

200

130

80

6

5_

150100 + + = 151

300

4 3 6

2 8 5_

5 1

3 13

Then, subtract the tens

When subtracting, the tens in the bigger number is sometimes smaller than the tens in the smaller number, e.g. 436 – 285When this happens, an adjustment is made from the hundreds to the tens. A hundred is effectively taken from the hundreds column.And added to the tens column.

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

400

200

130

80

6

5_

150100 + + = 151

300

4 3 6

2 8 5_

1 5 1

3 13

And, finally subtract the hundreds

When subtracting, the tens in the bigger number is sometimes smaller than the tens in the smaller number, e.g. 436 – 285When this happens, an adjustment is made from the hundreds to the tens. A hundred is effectively taken from the hundreds column.And added to the tens column.

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

400

200

130

80

6

5_

150100 + + = 151

300

4 3 6

2 8 5_

1 5 1

3 13

And, finally subtract the hundreds

That’s it for now......

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