Adding within 100
Add within 100 using strategies based on place value, including adding a two-digit and one-digit number, and a two-digit and a multiple of 10
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Teaching Table
Set out your lesson
“Can your child work out sums like '47 + 8' or '35 + 50' by thinking about the tens and ones separately rather than counting up one at a time?”
Full guide and materials
- Activity. Add within 100 using strategies based on place value, including adding a two-digit and one-digit number, and a two-digit and a multiple of 10
What to notice. Calculate 46 + 7 using place value (46 + 4 + 3 = 53) • Calculate 38 + 40 = 78 using tens understanding • Relate the strategy to a written method and explain the reasoning
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Can your child work out sums like '47 + 8' or '35 + 50' by thinking about the tens and ones separately rather than counting up one at a time?
Add within 100 using strategies based on place value, including adding a two-digit and one-digit number, and a two-digit and a multiple of 10
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Check understanding
- Calculate 46 + 7 using place value (46 + 4 + 3 = 53)
- Calculate 38 + 40 = 78 using tens understanding
- Relate the strategy to a written method and explain the reasoning
“Can your child work out sums like '47 + 8' or '35 + 50' by thinking about the tens and ones separately rather than counting up one at a time?”
Curriculum record
- Type
- Procedural
- Subject
- Mathematics
- Domain
- Addition & Subtraction
- Age range
- Ages 6–7
Standards