Question 64

The following equation is incorrect. Which two signs should be interchanged to correct the equation?
12 + 10 - 28 ÷ 7 x 4 = 48

Solution

Expression : 12 + 10 - 28 ÷ 7 x 4 = 48

(A) : - and x

$$\equiv12+10\times28\div7-4=48$$

L.H.S. = $$12+(10\times\frac{28}{7})-4$$

= $$12+40-4=48=$$ R.H.S.

=> Ans - (A)

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The following equation is incorrect. Which two signs should be interchanged to correct the equation?12 + 10 - 28 ÷ 7 x 4 = 48