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Mental Maths Addition Subtraction
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Mental Maths Addition Subtraction
🧠 Part 1: Mental Addition
Work these out in your head. Only add to the ones digit!
1. 234 + 5 = _______
2. 567 + 2 = _______
3. 412 + 7 = _______
4. 189 + 4 = _______
5. Challenge: 299 + 6 = _______
Hint: Think about making 300 first!
➖ Part 2: Mental Subtraction
Work these out in your head. Only subtract from the ones digit!
6. 478 - 3 = _______
7. 635 - 4 = _______
8. 521 - 6 = _______
9. 346 - 2 = _______
10. Challenge: 402 - 5 = _______
Hint: What happens when you need to borrow?
💭 Part 3: Explain Your Thinking
11. Show how you worked out 267 + 8 mentally:
12. Explain your method for 354 - 7:
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