Mathematics·Addition & Subtraction·procedural
Subtracting multiples of 10
Subtract multiples of 10 (10–90) from multiples of 10 using place value strategies
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 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 Subtracting multiples of 10 quickly work out '80 − 50' or '70 − 40' in their head by thinking about how many tens are left?
Standards alignment
1.NBT.6US · ccss-math
Subtract multiples of 10
Common Core State Standards for Mathematics · 1