Add multiples of 10 to 2-digit numbers.
I can use number facts to add multiples of 10 to two-digit numbers.
Add multiples of 10 to 2-digit numbers.
I can use number facts to add multiples of 10 to two-digit numbers.
These resources will be removed by end of Summer Term 2025.
Lesson details
Key learning points
- When adding multiples of ten to a two-digit number, the tens digit changes but the ones digit stays the same.
- Number facts can be used to help add and subtract multiples of ten to and from a two-digit number.
Keywords
Multiples of ten - The numbers that are said when we count on in tens from zero. Multiples of ten always have a ones digit of zero.
Recombine - To add the parts of a number gained through partitioning the whole to reach the whole amount again.
Common misconception
Children may automatically count on in tens to add a multiple of ten.
Discuss efficiency and compare different methods. Use practical equipment to draw attention to the relationship between adding multiples of ten in two-digit numbers and the known facts they already possess.
Licence
This content is © Oak National Academy Limited (2024), licensed on Open Government Licence version 3.0 except where otherwise stated. See Oak's terms & conditions (Collection 2).
Lesson video
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Starter quiz
6 Questions
65
49
53
99
19
27
45
51
33
47
56
64
Exit quiz
6 Questions
3 tens + 4 tens = 7 tens
20 + 60 = 80
50 + 40 = 90
