Question
Which two signs should be interchanged to make the
following equation correct? 9 × 10 ÷ 2 – 4 = 51 + 2ÂSolution
9 × 10 ÷ 2 + 4 = 51 – 2  9 × 5 + 4 = 49 45 + 4 = 49 49 = 49
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