Question 1

Find out the two signs to be interchanged to make the following equation correct.
$$10 + 10 \times 10 - 10 \div 10 = -89$$

Solution

Expression : $$10 + 10 \times 10 - 10 \div 10 = -89$$

(A) : $$-$$ and $$\times$$

L.H.S. $$\equiv10+10-10\times10\div10$$

= $$20-10=10$$

(B) : $$\times$$ and $$\div$$

L.H.S. $$\equiv10+10\div10-10\times10$$

= $$10+1-100=-89=$$ R.H.S.

=> Ans - (B)

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Find out the two signs to be interchanged to make the following equation correct.$$10 + 10 \times 10 - 10 \div 10 = -89$$