# Adding multiples of 10 to 3-digit numbers

## Lesson details

### Key learning points

1. In this lesson, we will use known number facts in order to mentally add multiples of 10 to 3-digit numbers. We will look at partitioning strategies and analyse place value to make mental addition 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.
Tick the 3-digit number below
12
33
99
Q2.
Which one of these shows a number bond to 20
18 + 1
20 + 5
6 + 16
Q3.
12 + 9 =
129
20
22
Q4.
222 + 7 =
227
272
300
Q5.
308 + 8 =
310
388
416

## Exit quiz

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### 5 Questions

Q1.
Which one of these is a 3 digit number?
19
34
78
Q2.
674 + 20 =
1000
664
684
Q3.
654 + 30 = 694 True or false?
True
Q4.
520 + 80 =
580
700
800
Q5.
666 + 50 =
1000
675
676