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

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

Operations on Rational Numbers Class 7 Practice Set 24 Answers Solutions Chapter 5

Question 1.
Write the following rational numbers in decimal form.

ii. −7/8

iii. 7  3/5

iv. 5/12

v. 22/7

vi. 4/3

vii. 7/9

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

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 17/20 and 19/6
Now, 20 = 2 x 2 x 5, and 6 = 2 x 3
∴ 17/20 is terminating decimal form while 19/6 is recurring decimal form.