Mental Calculation
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problemFavouriteNumber Balance
Can you hang weights in the right place to make the the number balance balanced?
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problemFavouriteWhat Could It Be?
In this calculation, the box represents a missing digit. What could the digit be? What would the solution be in each case?
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problemFavouriteSubtraction Slip
Can you spot the mistake in this video? How would you work out the answer to this calculation?
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problemFavouriteArranging Additions and Sorting Subtractions
Order these four calculations from easiest to hardest. How did you decide?
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problemFavouriteFind the Difference
Place the numbers 1 to 6 in the circles so that each number is the difference between the two numbers just below it.
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problemFavourite2, 4, 6, 8
Using the cards 2, 4, 6, 8, +, - and =, what number statements can you make?
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problemFavouriteDicey Addition
In these addition games, you'll need to think strategically to get closest to the target.