Subtracting multiples of 10
Subtract multiples of 10 (10–90) from multiples of 10 using place value strategies
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Teaching Table
Set out your lesson
“Can your child quickly work out '80 − 50' or '70 − 40' in their head by thinking about how many tens are left?”
Full guide and materials
- Activity. Subtract multiples of 10 (10–90) from multiples of 10 using place value strategies
What to notice. Calculate 70 − 30 = 40 • Use base-ten blocks to show 80 − 50 = 30 • Explain that subtracting tens is like subtracting the tens digits
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Can your child quickly work out '80 − 50' or '70 − 40' in their head by thinking about how many tens are left?
Subtract multiples of 10 (10–90) from multiples of 10 using place value strategies
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Check understanding
- Calculate 70 − 30 = 40
- Use base-ten blocks to show 80 − 50 = 30
- Explain that subtracting tens is like subtracting the tens digits
“Can your child quickly work out '80 − 50' or '70 − 40' in their head by thinking about how many tens are left?”
Curriculum record
- Type
- Procedural
- Subject
- Mathematics
- Domain
- Addition & Subtraction
- Age range
- Ages 6–7
Standards