Solve comparative addition and difference problems (3)

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Description

Pupils need to be able to solve problems with missing addends using known number facts or calculation strategies, for example:

19 +    = 25

Pupils need to be able to recognise problems about difference, and relate them to subtraction. For example, they should understand that they need to calculate 3 +   =  5 or   5 – 3 =   to solve the problem: There are 5 red cars and 3 blue cars. What is the difference between the number of red cars and blue cars?

Pupils should be able to recognise contextual problems involving finding a difference, phrased as ‘find the difference’, ‘how many more’ and ‘how many fewer’, such as those shown in the 2AS–2 below. Pupils may solve these problems by relating them to either a missing addend equation or to subtraction, applying known facts and strategies.

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