# Subtracting 3-digit numbers (regrouping tens to ones)

## Lesson details

### Key learning points

1. In this lesson, we will build on our knowledge of column addition and introduce regrouping for column subtraction.

### Licence

This content is made available by Oak National Academy Limited and its partners and licensed under Oak’s terms & conditions (Collection 1), except where otherwise stated.

## Video

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## Worksheet

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## Starter quiz

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### 5 Questions

Q1.
True or false, this calculation needs some regrouping? 54 + 23 =
True
Q2.
Which of these calculation needs regrouping?
150 + 140 =
Correct answer: 199 + 206 =
400 + 300 =
567 + 222 =
Q3.
555 + 555 =
1000
1010
600
Q4.
456 + 269 =
610
619
7025
Q5.
Check this answer - is it correct? 596 + 122 = 6118
Yes

## Exit quiz

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### 5 Questions

Q1.
Regrouping is always needed when...
Correct answer: digit/s in the 'part' are larger than those in the same column in the 'whole'
there is a 6
you are subtracting a 3-digit number
Q2.
Which of these calculations requires regrouping?
319 - 208 =
Correct answer: 456 - 147 =
500 - 200 =
567 - 111 =
Q3.
True or false this questions has been answered correctly? 456 - 147 = 311
True
Q4.
846 - 227 =
500
621
721
Q5.
Has this question been answered correctly? 526 - 309 = 217
Maybe
No