Addition and subtraction

There are 355 NRICH Mathematical resources connected to Addition and subtraction

problem

Favourite

The puzzling sweet shop

Age

5 to 11

Challenge level

There were chews for 2p, mini eggs for 3p, Chocko bars for 5p and lollypops for 7p in the sweet shop. What could each of the children buy with their money?

problem

Favourite

Abundant numbers

Age

7 to 11

Challenge level

48 is called an abundant number because it is less than the sum of its factors (without itself). Can you find some more abundant numbers?

problem

Favourite

The tomato and the bean

Age

5 to 7

Challenge level

At the beginning of May, Tom put his tomato plant outside. On the same day he sowed a bean in another pot. When will the two be the same height?

problem

Favourite

Got it

Age

7 to 14

Challenge level

A game for two people, or play online. Given a target number, say 23, and a range of numbers to choose from, say 1-4, players take it in turns to add to the running total to hit their target.