Mental calculations

This group activity will encourage you to share calculation strategies and to think about which strategy might be the most efficient.

Can you each work out the number on your card? What do you notice? How could you sort the cards?

Can you work out which drink has the stronger flavour?

Choose a symbol to put into the number sentence.

Mathematicians are always looking for efficient methods for solving problems. How efficient can you be?

Use your addition and subtraction skills, combined with some strategic thinking, to beat your partner at this game.

In this twist on the well-known Countdown numbers game, use your knowledge of Powers and Roots to make a target.

This Sudoku combines all four arithmetic operations.

Place the numbers 1 to 6 in the circles so that each number is the difference between the two numbers just below it.

Here's a chance to work with large numbers...