MathsFreePrintable
Missing Numbers Algebra
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Missing Numbers Algebra
🔍 Part 1: Find the Missing Numbers - Addition
Instructions: Work out what number is missing to make each number sentence correct.
1. 25 + _____ = 43
2. _____ + 36 = 58
3. 47 + _____ = 82
4. 156 + _____ = 234
5. _____ + 189 = 367
➖ Part 2: Find the Missing Numbers - Subtraction
Instructions: Work out what number is missing to make each number sentence correct.
6. 65 - _____ = 28
7. _____ - 24 = 39
8. 145 - _____ = 87
9. _____ - 126 = 248
10. 456 - _____ = 189
🧩 Part 3: Challenge Problems
Instructions: These are trickier! Show your working out.
11. 73 + _____ - 15 = 94
12. _____ - 45 + 28 = 156
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