Mental calculations

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More Dicey operations

Age

7 to 14

Challenge level

In these multiplication and division games, you'll need to think strategically to get closest to the target.
problem
6 by 6 Mathdokus

Age

7 to 16

Challenge level

Can you use the clues to complete these 6 by 6 Mathematical Sudokus?
problem
5 by 5 Mathdokus

Age

7 to 16

Challenge level

Can you use the clues to complete these 5 by 5 Mathematical Sudokus?
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4 by 4 Mathdokus

Age

7 to 14

Challenge level

Can you use the clues to complete these 4 by 4 Mathematical Sudokus?
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3 by 3 Mathdokus

Age

7 to 14

Challenge level

Can you use the clues to complete these 3 by 3 Mathematical Sudokus?
problem
Mathdoku

Age

7 to 11

Challenge level

Complete the Mathdoku grid using the clues. Can you convince us that the number you have chosen for each square has to be correct?
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An easy way to multiply by 10?

Age

7 to 11

Challenge level

Do you agree with Badger's statements? Is Badger's reasoning 'watertight'? Why or why not?
problem
Equivalent pairs

Age

5 to 7

Challenge level

Can you match pairs of cards which show the same amount?
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Arranging additions and sorting subtractions

Age

5 to 7

Challenge level

Order these four calculations from easiest to hardest. How did you decide?
problem
Subtraction slip

Age

5 to 7

Challenge level

Can you spot the mistake in this video? How would you work out the answer to this calculation?