The document Extra Questions- Exponents and Powers Class 8 Notes | EduRev is a part of the Class 8 Course Class 8 Mathematics by Full Circle.

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**Question 1: **Find the value of: **Solution:****Question 2: Simplify: **

**Solution: **

Thuss,**Question 3:** Find the value of m when **Solution:** We have

Since base is same on both sides, then their exponents are same.

∴ m – 5 = 3

⇒ m = 3 + 5 = 8

Thus, the required value of m is 8.**Question 4:** Simplify: **Solution:****Question 5:** Write the following in standard form:

(i) 0.000000456 and (ii) 34500000.**Solution:** We have

Thus, 0.000000456 = 4.56 * 10^{–7}

(ii) 34500000 = 345 * 100000

= 3.45 * 100 * 100000

= 3.45 * 10^{2} * 10^{5} = 3.45 * 10^{2+5}

= 3.45 * 107

Thus, 34500000 = 3.45 * 10^{7}**Question 6:** Express 2.0001 * 10^{9} in usual form.**Solution:** We have

= 20001 * 100000

= 2000100000

Thus, 2.0001 * 10^{9} = 2000100000

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