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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