Year 3

Year 3

# Adding and subtracting multiples of 100 to/from 3-digit numbers

## Lesson details

### Key learning points

1. In this lesson, we will use known number facts in order to mentally add and subtract multiples of 100 to and from 3-digit numbers. We will look at partitioning strategies and analyse place value to make mental addition and subtraction more efficient.

### 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.
When we subtract the number we started with gets...
bigger
Q2.
356 - 40 = 326 True or false?
True
Q3.
673 - 60 =
623
633
666
Q4.
532 - 40 =
482
502
600
Q5.
300 - 60 =
320
360
440

## Exit quiz

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### 5 Questions

Q1.
When we subtract the original number always gets bigger? True or false?
True
Q2.
Is this calculation correct? 456 - 300 = 200
Maybe
Yes
Q3.
567 + 300 =
100
267
800