# New Learning Composite Mathematics Class 7 SK Gupta Anubhuti Gangal Rational Numbers Chapter 3A Solution

### New Learning Composite Mathematics SK Gupta Anubhuti Gangal Class 7 Rational Numbers self Practice 3A Solution

(1) Which of the following are not rational numbers?
(a) 2/-3
(b) 7/8
(c) -8/15
(d) 0
(e) -7/-18
(f) 0/3
(g) 5/0
(h) 0/0

(2) Express the following in the form p/q
(a) 4
(b) 2~1/5
(c) -8
(d) -2~3/7

(3) Are the rational numbers 2/3, 4/6, 6/9, 8/12, -10/-15, -42/-63 equivalent?

(4) Is the number 17/40 equivalent to -34/80 or 34/-80?

(5) Write the following rational numbers in standard form.
(a) 20/35
(b) -18/30
(c) 190/-76

SOLUTION Number 1, 2 & 3:

(6) Identify the positive and negative rational numbers.
(a) 5/13
(b) 11/-18
(c) -23/70
(d) -15/-8
(e) 0
(f) 7
(g) 7
(h) -12

(7) Write four rational numbers equivalent to each of the following rational numbers.
(a) 3/5
(b) -6/7
(c) 8/-9
(d) 2
(e) -1

(8) Express:
(a) 2/5 as a rational number with denominator 35.
(b) -8/11 as a rational number with (i) numerator 16, (ii) denominator 33
(c) 19/-5 as a rational number with (i) numerator 57, (ii) denominator 20

(9) Find x so that
(a) -2/15 = 16/x
(b) 8/-3 = x/9
(c) -35/x = -5

(10) Which of the following rational numbers are equivalent?
(a) 5/8 and 10/16
(b) -6/15 and 14/-35
(c) -9/-27 and -3/8

SOLUTION Number 6, 7, 8, 9 & 10:

Updated: January 23, 2020 — 2:44 pm