Operations on Rational Numbers Class 7 Maths Chapter 5 Practice Set 24 Solutions Maharashtra Board

Operations on Rational Numbers Class 7 Maths Chapter 5 Practice Set 24 Solutions Maharashtra Board

Maharashtra state board textbooks

Std 7 Maths Practice Set 24 Solutions Answers

Question 1.
Write the following rational numbers in decimal form.
i. 134
ii. −78
iii. 735
iv. 512
v. 227
vi. 43
vii. 79
Solution:
i. 134

ii. −78

iii. 735

iv. 512

v. 227

vi. 43

vii. 79

Maharashtra Board Class 7 Maths Chapter 5 Operations on Rational Numbers Practice Set 24 Intext Questions and Activities

Maharashtra state board textbooks

Question 1.
Without using division, can we tell from the denominator of a fraction, whether the decimal form of the fraction will be a terminating decimal? Find out. ( Textbook pg. no. 40)
Solution:
If the prime factorization of the denominator of a fraction has only factors as 2 or 5 or a combination of 2 and 5 then the decimal form of that fractional will be a terminating decimal form.
Consider the fractions 1720 and 196
Now, 20 = 2 x 2 x 5, and 6 = 2 x 3
∴ 1720 is terminating decimal form while 196 is recurring decimal form.