Question 64
The following equation is incorrect. Which two signs should be interchanged to correct the equation?
20 + 12 x 35 - 20 ÷ 10 = 31
Solution
Expression : 20 + 12 x 35 - 20 ÷ 10 = 31
(A) : ÷ and -
$$\equiv20+12\times35\div20-10=31$$
L.H.S. = $$20+(12\times\frac{35}{20})-10$$
= $$20+21-10=31=$$ R.H.S.
=> Ans - (A)
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