Question 13

Which two signs should be interchanged in the following equation to make it correct?
$$15 + 8 - 20 \times 10 \div 5 = 13$$

Solution

$$15 + 8 - 20 \times 10 \div 5 = 13$$

After interchanging $$\times and \div$$

$$15 + 8 - 20 \div 10 \times 5 = 13$$

$$15+8-10=13$$

$$13=13$$

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