NCERT Book Class 8 Maths Chapter 10 Exponents and Powers
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NCERT Book Class 8 Maths Chapter 10 Exponents and Powers – Text
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Page 1
CHAPTER
Exponents and Powers
10
10.1 Introduction
Do you know?
Mass of earth is 5,970,000,000,000, 000, 000, 000, 000 kg. We have
already learnt in earlier class how to write such large numbers more
conveniently using exponents, as, 5.97 × 1024 kg.
We read 1024 as 10 raised to the power 24.
We know 25 = 2 × 2 × 2 × 2 × 2
and 2m = 2 × 2 × 2 × 2 × ... × 2 × 2 ... (m times)
Let us now find what is 2– 2 is equal to?
10.2 Powers with Negative Exponents
Exponent is a
You know that, 102 = 10 × 10 = 100 negative integer.
100
101 = 10 =
10
10
100 = 1 =
10 As the exponent decreases by1, the
10– 1 = ? value becomes one-tenth of the
previous value.
1
Continuing the above pattern we get,10– 1 =
10
1 1 1 1 1
Similarly 10– 2 = ÷ 10 = × = = 2
10 10 10 100 10
1 1 1 1 1
10– 3 = ÷ 10 = × = = 3
100 100 10 1000 10
What is 10– 10 equal to?
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Document Details
| Board / Org | NCERT |
| Exam | Class 8 |
| Type | Books |
| Pages | 16 |
| Updated | 22 Jul 2026 |