Examples of what pupils should know and be able to do
Find mentally or use jottings to find the value of:
16 ÷ 4 + 8 = 12
16 + 8 ÷ 4 = 18
14 × 7 + 8 × 11 = 186
32 + 13 × 5 = 97
(3² + 4²)² = 625
Recognise that in the expression 2 + 5a the multiplication is to be performed first.
Probing questions
Two different calculators give different answers to the calculation 2 + 4 × 6. What are the two answers? Can you explain how the different answers were calculated? Which answer is correct? Can you explain why?
What if pupils find this a barrier?
Pupils may need more experience of developing formulae (and calculations) from function cards (or operation cards) and then 'reading' the resulting formula or calculation.
Function cards might include:
- multiply by 2;
- square;
- add 6;
- divide by 3.
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