Mathematics·Addition & Subtraction·procedural
Adding Three Small Numbers
Add three one-digit numbers using strategies including looking for pairs that make 10
Suggested ages 6–7
Learning journey
Your child is building strong foundations in addition and subtraction — learning to add and subtract numbers fluently within 20, understanding the relationship between these operations, and applying various mental strategies to solve problems.
Evidence of understanding
- Calculate 5 + 7 + 3 by first adding 7 + 3 = 10, then 5 + 10 = 15
- Add any three single-digit numbers correctly
- Identify useful pairs within three addends to make the calculation easier
Assessment prompt
If Adding Three Small Numbers needs to add 4 + 6 + 8, can they spot that 4 and 6 make 10 first, then add 8 to get 18 — rather than just adding in order from left to right?
Standards alignment
1.OA.2US · ccss-math
Solve word problems with three whole numbers
Common Core State Standards for Mathematics · 1
Maths/Y2/AS/7GB · uk-nc-2013
Add three one-digit numbers
The national curriculum in England: Key stages 1 and 2 framework document · Key Stage 1