Question 16

Interchanging which two signs will make the following equation correct? $$15 + 3 \times 9 - 4 \div 16$$ = 57

Solution

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$$+ and \div$$

Given equation $$15 + 3 \times 9 - 4 \div 16$$ = 57

interchange  $$+ and \div$$

$$15 \div 3 \times 9 - 4 + 16=45+12=57$$

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