Mathematics
Addition & Subtraction
Procedural
6–7 yrs
Subtracting multiples of 10
整十数的减法
Description
Subtract multiples of 10 (10–90) from multiples of 10 using place value strategies
Mastery Evidence
- Calculate 70 − 30 = 40
- Use base-ten blocks to show 80 − 50 = 30
- Explain that subtracting tens is like subtracting the tens digits
Assessment Prompt
Can your child quickly work out '80 − 50' or '70 − 40' in their head by thinking about how many tens are left?
Prerequisites 2
The multiples of 10
减去10的倍数需要理解整十数作为十的组成单位
Subtraction as taking away or separating
减去10的倍数需要理解减法概念
Unlocks 0
No follow-up topics
