Mathematics
Addition & Subtraction
Procedural
6–7 yrs
Adding Three Small Numbers
三个小数相加
Description
Add three one-digit numbers using strategies including looking for pairs that make 10
Mastery Evidence
- 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 your child 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?
Unlocks 1
Adding numbers
