## ML Aggarwal Class 8 Solutions for ICSE Maths Chapter 2 Exponents and Powers Check Your Progress

Question 1.

Evaluate:

Solution:

Question 2.

Simplify:

Solution:

Question 3.

Find the multiplicative inverse of

Solution:

Question 4.

Simplify and write in exponential form:

Solution:

Question 5.

Simplify:

Solution:

Question 6.

Prove that (a + b)^{-1} (a^{-1} + b^{-1}) = (ab)^{-1}.

Solution:

Question 7.

Find the value of x for which

Solution:

Question 8.

If , find the value of n.

Solution:

Question 9.

By what number should be multiplied to get ?

Solution:

Question 10.

By what number should be divided to get ?

Solution:

Question 11.

Express the following numbers in standard form:

(i) 0.0000000003904

(ii) 12730000000000

Solution:

Question 12.

Express the following numbers in the usual form:

(i) 5.73 × 10^{-11}

(ii) 3.895 × 10^{15}.

Solution:

Question 13.

If , then find the value of .

Solution:

Question 14.

Mass of the Earth is 5.97 × 10^{24} kg and mass of the Moon is 7.35 × 10^{22} kg. What is the difference of their masses?

Solution:

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