Mental calculations

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

Using the cards 2, 4, 6, 8, +, - and =, what number statements can you make?

Arrange the numbers 1 to 6 in each set of circles below. The sum of each side of the triangle should equal the number in its centre.

Use the information about Sally and her brother to find out how many children there are in the Brown family.

As you come down the ladders of the Tall Tower you collect useful spells. Which way should you go to collect the most spells?

Find a great variety of ways of asking questions which make 8.

Follow the clues to find the mystery number.

Practise your tables skills and try to beat your previous best score in this interactive game.

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

Here are some short problems for you to try. Talk to your friends about how you work them out.