Class 8

Exponents and Powers question bank (Mathematics)

Practice 29 free Class 8 Mathematics - Exponents and Powers questions with answers and step-by-step solutions.

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Q1.

Express the number $0.0000000000085$ in standard scientific notation:

(A)

$8.5 \times 10^{-12}$

(B)

$8.5 \times 10^{-11}$

(C)

$85 \times 10^{-13}$

(D)

$8.5 \times 10^{12}$

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Q2.

Consider the mathematical concept of 'Negative Exponents and Laws' in the chapter 'Exponents and Powers'. Which property holds true?

(A)

Standard algebraic/arithmetic axioms and identity theorems apply rigorously to Negative Exponents and Laws

(B)

Equations cannot be verified by substitution

(C)

Commutative property never holds for addition

(D)

Negative numbers have no real meaning in algebra

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