Question 41

Which two signs need to be interchanged to make the given equation correct?
$$27 - 3 \times 2 \div 13 + 9 = 14$$

Solution

Option (a) $$\div, +$$

$$27 - 3 \times 2 + 13 \div 9 = 14$$

$$27-6+\frac{13}{9}=14$$

This is the not correct answer. Because the given equation is not satisfied and gives fractional values.

Option (b) $$\times, \div$$

$$27 - 3 \div 2 \times 13 + 9 = 14$$

$$27-\frac{3}{2}\times13+9=14$$

This is the not correct answer. Because the given equation is not satisfied and gives fractional values.

Option (c) $$-, \div$$

$$27 \div 3 \times 2 - 13 + 9 = 14$$

$$\frac{27}{3}\times2-13+9=14$$

$$9\times2-13+9=14$$

18-13+9=14

5+9=14

14=14

This is the correct answer. Becasue the given equation is satisifed.

Option (d) $$-, \times$$

$$27 \times 3 - 2 \div 13 + 9 = 14$$

This is the not correct answer. Because the given equation is not satisfied and gives fractional values.


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