Addition and subtraction

There are 355 NRICH Mathematical resources connected to Addition and subtraction
Got \It for Two
game

Got it for two

Got It game for an adult and child. How can you play so that you know you will always win?

Nice or Nasty for Two
game

Nice or nasty for two

Some Games That May Be Nice or Nasty for an adult and child. Use your knowledge of place value to beat your opponent.
Dotty Six for Two
game

Dotty six for two

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

Strike it out
game

Strike it out for two

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

Shut the Box for Two
game

Shut the box for two

Shut the Box game for an adult and child. Can you turn over the cards which match the numbers on the dice?
Sums and Differences 2
problem

Sums and differences 2

Age
7 to 11
Challenge level
filled star empty star empty star
Find the sum and difference between a pair of two-digit numbers. Now find the sum and difference between the sum and difference! What happens?
Sums and Differences 1
problem

Sums and differences 1

Age
7 to 11
Challenge level
filled star empty star empty star
This challenge focuses on finding the sum and difference of pairs of two-digit numbers.
Money Line-up
problem

Money line-up

Age
5 to 7
Challenge level
filled star empty star empty star
In this game for two players, the aim is to make a row of four coins which total one dollar.
Journeys
problem

Journeys

Age
7 to 11
Challenge level
filled star empty star empty star
Investigate the different distances of these car journeys and find out how long they take.
Some Secret Codes
problem

Some secret codes

Age
7 to 11
Challenge level
filled star filled star filled star
Can you follow the rule to decode the messages?