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?

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

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

Follow the clues to find the mystery number.

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

This problem is designed to help children to learn, and to use, the two and three times tables.

Can you find all the ways to get 15 at the top of this triangle of numbers? Many opportunities to work in different ways.

Lola bought a balloon at the circus. She gave the clown six coins to pay for it. What could Lola have paid for the balloon?

Put operations signs between the numbers 3, 4, 5 and 6 to make the highest possible number and lowest possible number.