In Year 5, which is like the third year of KS2 Maths, we'll tackle some more challenging addition and subtraction puzzles, even with tricky decimals! By now, we know how to use plus (+) for adding and minus (-) for taking away. Plus (+) helps make numbers bigger, like 5 + 5 = 10. Minus (-) makes numbers smaller, like 8 - 4 = 4. We have cool tricks like counting steps, rounding numbers, and using number bonds to make Maths easier!
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You can find more about this topic by visiting BBC Bitesize - Adding and subtracting
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57 + 53 = 110
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1 + 8 = 9
so 0.1 + 0.8 = 0.9 |
1.5 x 2 = 3.0
3.0 + 0.1 = 3.1 so 1.5 + 1.6 = 3.1 |
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e.g. 456 - 79 so 456 - 80 = 376 + 1 = 377
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347 + 100 = 447
447 - 3 = 444 so 347 + 97 = 444 |
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The correct number sentence would be 875 - 819 = 56
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The best way to work this out is to take 6.4 from 7, which would give you the answer 0.6
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e.g. 2,898 + 2 = 2,900 + 100 = 3,000 + 4 = 3,004 so 3 steps gives the answer 106
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673 + 37 = 710
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so 199 - 23 = 176