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Adding in Your Head
Age 8 · Maths
Add the tens first, then add the units. Put the two answers together to find the total.
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Age 8: open this week
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Examples
- 47 + 25: 40 + 20 = 60 and 7 + 5 = 12, so the total is 72.
- 36 + 48: 30 + 40 = 70 and 6 + 8 = 14, so the total is 84.
Key takeaways
- Add tens with tens and units with units.
- Join the two answers to get the final total.
Quiz: Adding in Your Head (Age 8)
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Which parts do you add separately when adding two-digit numbers in your head?
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When adding two-digit numbers in your head, what do you add first?
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After you add the tens and the units, how do you get the final total?
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