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 Question from Jacky, a parent: 4*4+4*4+4-4*4=???

Hi Jacky,

The convention that we use in mathematical expressions is that you perform any multiplications before additions or subtractions. Thus

$4 \times 4 + 4 \times 4 + 4 - 4 \times 4$

should be seen as

$16 + 16 + 4 - 16 = 20$

Penny

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