Mental addition and subtraction (age 6+)
Add and subtract a two-digit number and ones mentally and using concrete/pictorial representations
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Teaching Table · Plan outline
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“Can your child work out '36 + 7' or '42 − 5' in their head — keeping the tens in place and only adjusting the ones?”
Full guide and materials
- Activity. Add and subtract a two-digit number and ones mentally and using concrete/pictorial representations
What to notice. Calculate 36 + 7 = 43 using objects or mentally • Calculate 52 − 4 = 48 using a number line or mentally • Explain bridging through 10 when adding ones to a two-digit number
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Can your child work out '36 + 7' or '42 − 5' in their head — keeping the tens in place and only adjusting the ones?
Add and subtract a two-digit number and ones mentally and using concrete/pictorial representations
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Check understanding
- Calculate 36 + 7 = 43 using objects or mentally
- Calculate 52 − 4 = 48 using a number line or mentally
- Explain bridging through 10 when adding ones to a two-digit number
“Can your child work out '36 + 7' or '42 − 5' in their head — keeping the tens in place and only adjusting the ones?”
Curriculum record
- Type
- Procedural
- Subject
- Mathematics
- Domain
- Addition & Subtraction
- Age range
- Ages 6–7
Standards