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CBSE Class 8 Maths Revision Notes Chapter 12 – Exponents and Powers

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 NameExponents and Powers
ChapterChapter 12
ClassClass 8
SubjectMaths Revision Notes
BoardCBSE
TEXTBOOKCBSE NCERT
CategoryRevision 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 1011.
  • 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) = an.
    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.