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

New Learning Composite Mathematics SK Gupta Anubhuti Gangal Class 7 Rational Numbers Self Practice 3C Solution

(1) Find each sum.

(a) 1/5 + 2/-5
(b) 1~3/8 + 3~7/8
(c) -1/4 + 3/-4
(d) -1/10 + (-7/10)
(e) 1~3/4 + (-1~1/4)
(f) 1~7/12 + 11/-12
(g) -4/15 + 4/-15 + -4/15
(h) 17/-30 + 7/30 + 1~7/30

SOLUTION Number 1:

(2) Subtract

(a) -5/6 from 1/6
(b) 7/8 from 3/-8
(c) -1~3/4 from -2~1/4
(d) -1~3/10 from 7~1/-10

SOLUTION Number 2:

(3) Simplify:

(a) -15/22 + (7/-22)
(b) -1~4/29 + 2~7/29 + 18/-22

(4) Evaluate:

8/17 – x for x = 5/-17

SOLUTION Number 3:


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