Exponents and Powers class 8 Notes Mathematics

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Class 8 Mathematics notes Chapter 12 Exponents and Powers

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CBSE Class 8 Revision Notes Maths Exponents and Powers

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.

CBSE Class 8 Revision Notes and Key Points

Exponents and Powers class 8 Notes Mathematics. CBSE quick revision note for class-8 Mathematics, Chemistry, Math’s, Biology and other subject are very helpful to revise the whole syllabus during exam days. The revision notes covers all important formulas and concepts given in the chapter. Even if you wish to have an overview of a chapter, quick revision notes are here to do if for you. These notes will certainly save your time during stressful exam days.

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