Addition and subtraction

problem
Big dog, little dog

Age

5 to 7

Challenge level

Woof is a big dog. Yap is a little dog. Emma has 16 dog biscuits to give to the two dogs. She gave Woof 4 more biscuits than Yap. How many biscuits did each dog get?
problem
2, 4, 6, 8

Age

5 to 7

Challenge level

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

Age

7 to 11

Challenge level

In this section from a calendar, put a square box around the 1st, 2nd, 8th and 9th. Add all the pairs of numbers. What do you notice about the answers?
problem
Christmas shopping

Age

7 to 11

Challenge level

Vera is shopping at a market with these coins in her purse. Which things could she give exactly the right amount for?
problem
Up and down

Age

5 to 7

Challenge level

Sam got into an elevator. He went down five floors, up six floors, down seven floors, then got out on the second floor. On what floor did he get on?
problem
The amazing splitting plant

Age

5 to 7

Challenge level

Can you work out how many flowers there will be on the Amazing Splitting Plant after it has been growing for six weeks?
problem
Two dice

Age

5 to 7

Challenge level

Find all the numbers that can be made by adding the dots on two dice.
problem
Domino square

Age

7 to 11

Challenge level

Use the 'double-3 down' dominoes to make a square so that each side has eight dots.
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
Five coins

Age

5 to 11

Challenge level

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