Year 3

Year 3

# Subtracting 3-digit numbers (regrouping in multiple columns)

## Slide deck

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## Lesson details

### Key learning points

1. In this lesson, we will consolidate learning on column subtraction and will practise regrouping across all columns

### 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.
Regrouping means...
Addition
multiplication
subtraction
Correct answer: using numbers from the next largest place value column
Q2.
Which of these calculations requires regrouping?
317 - 205 =
444 - 222 =
Correct answer: 900 - 610 =
900 - 700 =
Q3.
Does this calculation require regrouping?
Maybe
No
Correct answer: Yes
Q4.
458 - 192 =
199
200
Correct answer: 266
346
Q5.
Is this calculation correct? 520 - 150 = 330
Maybe
Correct answer: No
Yes

## Exit quiz

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### 5 Questions

Q1.
Column subtraction is a...
estimate
mental strategy
Correct answer: written method
Q2.
Which of these calculations require regrouping?
215 - 111 =
600 - 500 =
678 - 123 =
Correct answer: 911 - 822 =
Q3.
Does this look like a reasonable answer? 754 - 569 = 501
Correct answer: No
Yes
Q4.
943 - 276 = 767 True or false?
Correct answer: False
Option 1
True
Q5.
761 - 279 =
Correct answer: 482
518
582
600