Mental Calculation
-
-
problemFavouriteNumber Balance
Can you hang weights in the right place to make the the number balance balanced?
-
-
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?
-
problemFavouriteSubtraction Slip
Can you spot the mistake in this video? How would you work out the answer to this calculation?
-
problemFavouriteArranging Additions and Sorting Subtractions
Order these four calculations from easiest to hardest. How did you decide?
-
-
problemFavouriteThe Tall Tower
As you come down the ladders of the Tall Tower you collect useful spells. Which way should you go to collect the most spells?
-
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.
-
problemFavourite2, 4, 6, 8
Using the cards 2, 4, 6, 8, +, - and =, what number statements can you make?