Instructions

What approximate value will come in place of the question mark (?) in the following questions ? (You are not expected to calculate exact value.)

Question 96

$$(32.51)^{2}- (17.45)^{2} = ?$$

Solution

Expression : $$(32.51)^{2}- (17.45)^{2} = ?$$

= $$(32.51 - 17.45) (32.51 + 17.45)$$

= $$49.96 \times 15.06$$

$$\approx 50 \times 15 = 750$$

Create a FREE account and get: