Addition and subtraction

There are 338 NRICH Mathematical resources connected to Addition and subtraction
Equivalent Pairs
problem

Equivalent Pairs

Age
5 to 7
Challenge level
filled star empty star empty star
Can you match pairs of cards which show the same amount?
Getting the balance right
article

Getting the balance right

In this article for primary teachers, Ems shares some common misconceptions surrounding the equals sign, and suggests ways to help learners develop their understanding.
Interactive Balance
interactivity

Interactive Balance

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

True or False?

Age
7 to 11
Challenge level
filled star empty star empty star
Without doing lots of calculations, can you decide which of these number sentences are true? How do you know?
Sweetie Box
problem

Sweetie Box

Age
5 to 11
Challenge level
filled star empty star empty star
Max and Bryony both have a box of sweets. What do you know about the number of sweets they each have?
Subtraction Slip
problem

Subtraction Slip

Age
5 to 7
Challenge level
filled star empty star empty star
Can you spot the mistake in this video? How would you work out the answer to this calculation?
Fruity Pairs
problem

Fruity Pairs

Age
5 to 7
Challenge level
filled star empty star empty star
Which two items of fruit could Kate and Sam choose? Can you order the prices from lowest to highest?
Let's Get Flexible!
article

Let's Get Flexible!

In this article for primary teachers, Ems outlines how we can encourage learners to be flexible in their approach to calculation, and why this is crucial.
Football Sum
problem

Football Sum

Age
11 to 14
Challenge level
filled star filled star empty star
Find the values of the nine letters in the sum: FOOT + BALL = GAME