8th Concept Listmrs. Colville's Math Class

1. 8th Concept Listmrs. Colville's Math Classes
2. 8th Concept Listmrs. Colville's Math Class 1

DRAFT Lesson 1 Visualizing Numbers up to 5 000. DRAFT Lesson 1 Visualizing Numbers up to 5 000. Learn eighth grade math for free—functions, linear equations, geometric transformations, and more. Full curriculum of exercises and videos. Maths Formulas for Class 8 are provided here. These class 8 maths formulas for geometry and algebra will help to get acquainted with all the formulas and will make problem solving easier and more efficient. Click now to get complete 8th class maths formulas list.

NCERT Solutions for Class 8 Maths Chapter 12 Exponents and Powers

NCERT Solutions for Class 8 Maths Chapter 12 Exponents and Powers Exercise 12.1

Ex 12.1 Class 8 Maths Question 1.
Evaluate:
(i) 3^-2
(ii) (-4)^-2
(iii) ((frac { 1 }{ 2 }))^-5
Solution:

Ex 12.1 Class 8 Maths Question 2.
Simplify and express the result in power notation with a positive exponent.
Solution:

Ex 12.1 Class 8 Maths Question 3.
Find the value of
Solution:

Ex 12.1 Class 8 Maths Question 4.
Solution:

Ex 12.1 Class 8 Maths Question 5.
Find the value of m for which 5^m ÷ 5^-3 = 5⁵.
Solution:
5^m ÷ 5^-3 = 5⁵
⇒ 5^m-(-3) = 5⁵ [∵ a^m ÷ aⁿ = a^m-n]
⇒ 5^m+3 = 5⁵
Comparing the powers of equal bases, we have
m + 3 = 5
m = 5 – 3 = 2, i.e., m = 2

Ex 12.1 Class 8 Maths Question 6.
Evaluate:
Solution:

8th Concept Listmrs. Colville's Math Classes

Ex 12.1 Class 8 Maths Question 7.
Simplify:
Solution:

8th Concept Listmrs. Colville's Math Class 1

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