Each red box represents a missing operation (plus, minus, times or divide).
Can you work out what they are?
(36 ❑ 21) ❑ 25 = 781
21 ❑ (25 ❑ 35) = 81
(32 ❑ 31) ❑ 25 = -24
(34 ❑ 23) ❑ (38 ❑ 29) = 78
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BIDMAS is an acronym reminding students of the order of operation used when evaluating expressions involving a number of different operations. The letters of BIDMAS stand for:
When only addition and subtraction (or only multiplication and division) are left in an expression work them out in the order you find them, starting from the left and working towards the right.