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Mental Subtraction Mastery

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Mental Subtraction Mastery

Mental maths illustration

🟢 Part 1: Simple Mental Subtraction

Use mental strategies to solve these problems. Break numbers into tens and ones to help you.

1. 46 - 23 = _______
2. 53 - 14 = _______
3. 75 - 32 = _______
4. 68 - 15 = _______

🟡 Part 2: Moderate Mental Subtraction

These problems need more careful thinking. Remember to use place value strategies!

5. 78 - 39 = _______
6. 64 - 27 = _______
7. 83 - 46 = _______
8. Choose the best mental strategy for 70 - 34:

Subtract 30, then subtract 4

Count backwards from 70

Use a written method

🔴 Part 3: Challenge Mental Subtraction

Try these trickier problems using your mental strategies. Show your thinking!

9. 92 - 58 = _______
10. 85 - 49 = _______
11. Explain your mental strategy for question 10:
12. Real-life problem: You have £67 in your savings account. You spend £25 on a new game. How much money do you have left?

Answer: £_______

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