Addition and subtraction

game

Strike it out for two

Age

5 to 11

Challenge level

Strike it Out game for an adult and child. Can you stop your partner from being able to go?
game

Dotty six for two

Age

5 to 11

Challenge level

Dotty Six game for an adult and child. Will you be the first to have three sixes in a straight line?
problem
Digit addition

Age

5 to 11

Challenge level

Try out this number trick. What happens with different starting numbers? What do you notice?
problem
Sweetie box

Age

5 to 11

Challenge level

Max and Bryony both have a box of sweets. What do you know about the number of sweets they each have?
interactivity
Favourite

Interactive balance

Age

5 to 11

Challenge level

In this simulation of a balance, you can drag numbers and parts of number sentences on to the trays. Have a play!
problem
Month mania

Age

5 to 11

Challenge level

Can you design a new shape for the twenty-eight squares and arrange the numbers in a logical way? What patterns do you notice?
problem
Train carriages

Age

5 to 11

Challenge level

Suppose there is a train with 24 carriages which are going to be put together to make up some new trains. Can you find all the ways that this can be done?
problem
Five coins

Age

5 to 11

Challenge level

Ben has five coins in his pocket. How much money might he have?
problem
Ladybird box

Age

5 to 11

Challenge level

Place six toy ladybirds into the box so that there are two ladybirds in every column and every row.
problem
The puzzling sweet shop

Age

5 to 11

Challenge level

There were cola bottles for 2p, mini eggs for 3p, marshmallow twists for 5p and lollipops for 7p in the sweet shop. What could each of the children buy with their money?