## Revision Notes for CBSE Class 8 Maths Chapter 12 – Free PDF Download

Free PDF download of Class 8 Maths Chapter 12 – Exponents and Powers Revision Notes & Short Key-notes prepared by expert Maths teachers from latest edition of CBSE(NCERT) books. All Chapter 12 – Exponents and Powers Revision Notes to help you to revise complete Syllabus and Score More marks.

Maths NCERT Solutions for Class 8

Chapter Name | Exponents and Powers |

Chapter | Chapter 12 |

Class | Class 8 |

Subject | Maths Revision Notes |

Board | CBSE |

TEXTBOOK | CBSE NCERT |

Category | Revision Notes |

**Quick Revision Notes**

- Numbers with exponents obey the following laws of exponents.

(a)

(b)

(c)

(d)

(e)

(f) - Very small numbers can be expressed in standard form using negative exponents.
- Use of Exponents to Express Small Number in Standard form:

(i) Very large and very small numbers can be expressed in standard form.

(ii) Standard form is also called scientific notation form.

(iii) A number written as is said to be in standard form if m is a decimal number such that and n is either a positive or a negative integer. - Examples: 150,000,000,000 = 1.5 x 10
^{11}. - Exponential notation is a powerful way to express repeated multiplication of the same number. For any non-zero rational number ‘a’ and a natural number n, the product a x a x a x ……….. x a(n times) = a
^{n}.

It is known as the nth power of ‘a’ and is read as ‘a’ raised to the power n’. The rational number a is called the base and n is called exponent.