Indices Class 7 Maths Chapter 6 Practice Set 28 Solutions Maharashtra Board

Indices Class 7 Maths Chapter 6 Practice Set 28 Solutions Maharashtra Board

Std 7 Maths Practice Set 28 Solutions Answers

Question 1.
Simplify:
i. a6 ÷ a4
ii. m5 ÷ m8
iii. p3 ÷ p13
iv. x10 ÷ x10
Solution:
i. a6 ÷ a4
= a6-4
= a2

ii. m5 ÷ m8
= m5-8
= m-3

iii. p3 ÷ p13
= p3-13
= p-10

iv. x10 ÷ x10
= x10-10
= x0
= 1

Question 2.
Find the value of:
i. (-7)12 ÷ (-7)12
ii. 75 ÷ 73
iii. (45)3÷(45)2
iv. 47 ÷ 45
Solution:
i. (-7)12 ÷ (-7)12
= (-7)12-12
= (-7)0
= 1

ii. 75 ÷ 73
= 75-3
= 72
= 49

iii. (45)3÷(45)2
=(45)3−2=45

iv. 4 ÷ 4
= 47-5
= 42
= 16