Question 18

Which two signs should be interchanged to make the following equation correct?
$$40 + 10 \div 2 \times 8 - 17 = 17$$

Solution

$$40 + 10 \div 2 \times 8 - 17 $$

Interchanging $$+ and -$$ , we get ,

$$40 - 10 \div 2 \times 8 + 17 $$

=$$40 - 5 \times 8 + 17 $$

= 40 - 40 + 17

= 17

So , the answer would be option c)$$+ and -$$.

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