Learn Evaluate 9 8 Multiply 10 2

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# Evaluate: 9.8 × 10.2

**Solution:**

Given, 9.8 × 10.2 = (10 + 0.2)(10 - 0.2)

Using standard identity: a² - b² = (a + b)(a - b)

Here, a = 10 and b = 0.2

9.8 × 10.2 = (10 - 0.2) (10 + 0.2)

= 10² - (0.2)²

= 100 - 0.04 = 99.96

**✦ Try This: **Evaluate: 9.6 × 10.4

Given, 9.6 × 10.4 = (10 - 0.4) (10 + 0.4)

Using standard identity: a² - b² = (a + b)(a - b)

9.6 × 10.4 = (10 - 0.4) (10 + 0.4)

= 10² - (0.4)²

= 100 - 0.16 = 99.84

**☛ Also Check: **NCERT Solutions for Class 8 Maths Chapter 9

**NCERT Exemplar Class 8 Maths Chapter 7 Problem 86(xiv)**

## Evaluate: 9.8 × 10.2

**Summary:**

Evaluating 9.8 × 10.2 we get, 99.96

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