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Using Identities, Evaluate 1.05 × 9.5 - CBSE Class 8 - Mathematics

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Question

Using identities, evaluate 1.05 × 9.5

Solution

1.05 × 9.5 = 1.05 × 0.95 × 10

= (1 + 0.05) (1− 0.05) ×10

= [(1)2 − (0.05)2] × 10

= [1 − 0.0025] × 10 [(a + b) (a − b) = a2 − b2]

= 0.9975 × 10 = 9.975

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APPEARS IN

 NCERT Solution for Mathematics Textbook for Class 8 (2018 to Current)
Chapter 9: Algebraic Expressions and Identities
Ex. 9.50 | Q: 6.9 | Page no. 152
Solution Using Identities, Evaluate 1.05 × 9.5 Concept: Applying Identities.
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