Maths Quiz - Addition and Subtraction (Year 3) (Answers)
No doubt you have heard people talk about "hundreds", "thousands" and "millions" and the video will help you understand just how big these numbers are!
In Year 3, which is the first year in KS2 Maths, you'll learn cool tricks for adding and taking away numbers in Math. It'll make you super confident when you see plus or minus symbols.
Addition is when you put numbers together, like 10 girls + 7 boys = 17 friends at your party! And if you have 20 prizes, you'll have 3 extra because 20 - 17 = 3. See, you just did an addition and subtraction problem! It's helpful in real life too.
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You can find more about this topic by visiting BBC Bitesize - Adding and subtracting
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14 + 10 = 24
24 - 2 = 22 |
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17 - 10 = 7
7 + 2 = 9 |
7 - 4 = 3 so 70 - 40 = 30
30 + 5 = 35 |
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One way to work this out is to take 7 away from 20 which will give you the answer 13
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It might help to add the tens first and then the ones
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45 x 2 = 90
90 + 1 = 91 |
e.g. 35 + 9
so 35 + 10 = 45
then 45 - 1 = 44
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75 + 35 = 110
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The other number sentence that would be correct is 13 - 8 = 5
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17 + 3 = 20 plus 1 left over = 21