In Year 4, the second year in KS2 Maths, you'll tackle some tricky addition and subtraction problems. We're talking about big numbers and even negative numbers! But don't worry, you'll learn super cool ways to solve them.
Addition is when you add numbers, and subtraction is when you take them away. It's like having £10 and wanting to buy things that cost £3.47 and £6.91. You'd have £10.38, but you'd be 38p short. See how useful adding and subtracting is in real life?
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You can find more about this topic by visiting BBC Bitesize - Adding and subtracting
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e.g. 8 - 10 = -2
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100 - 56 = 44
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100 - 35 = 65
so 1,000 - 350 = 650 |
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40 x 2 = 80 and 7 x 2 = 14
80 + 14 = 94 |
2 x 8 = 16 and 2 x 30 = 60
60 + 16 = 76 76 - 1 = 75 |
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e.g. 46 + 19 so:
46 + 20 = 66 then 66 - 1 = 65 |
e.g. 56 - 21 so:
56 - 20 = 36 then 36 - 1 = 35 |
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The other correct number sentence would be 63 - 28 = 35
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Most maths problems can be made simpler
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30 + 20 = 50
then 7 + 8 = 15
then 50 + 15