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Mental Maths Addition Subtraction
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Mental Maths Addition Subtraction
Use mental strategies to solve each puzzle. You can make a friendly number, bridge through a ten or hundred, or split a number into parts.
Quick number moves
Work out each sum or difference in your head.
1.A parcel sorter has 238 parcels. It receives 6 more. How many parcels are there now?
2.A game score is 297 points. Alfie earns 5 more points. Choose the new score.
- 292
- 302
- 312
- 352
3.A number line starts at 268. Draw a jump of 7 to find the total. What number do you land on?
4.A café has 425 cups. It uses 3 cups. How many cups are left?
Bridge and explain
Think about crossing a ten or a hundred when you calculate.
5.A number line shows a subtraction starting at 403 and ending at 396. How many have been taken away?
6.True or false? 356 + 8 = 364. Explain how you can check your answer mentally.
7.Fill the gap: 512 − = 506.
8.A book costs £4. A bookmark costs £7. How much do they cost altogether? Explain a quick way to add the amounts.
9.A number line is marked from 490 to 510 in steps of 5. Write the missing number between 495 and 505.
10.A library has 632 books on a trolley. It puts 8 books on a shelf. How many books remain on the trolley? Describe one mental method.
3 printable pages
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