Question 39

The following equation is incorrect. Which two signs should be interchanged to correct the equation?

26 - 2 x 30 ÷ 6 + 16 = 20

Solution

Expression : 26 - 2 x 30 ÷ 6 + 16 = 20

(A) : ÷ and x

L.H.S. = $$26-2\div30\times6+16$$

= $$26-\frac{12}{30}+16=41.6\neq$$ R.H.S.

(B) : - and +

L.H.S. = $$26+2\times30\div6-16$$

= $$26+\frac{60}{6}-16=20=$$ R.H.S.

=> Ans - (B)

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The following equation is incorrect. Which two signs should be interchanged to correct the equation?26 - 2 x 30 ÷ 6 + 16 = 20