Add without using number line :
(a) 11 + (– 7)
(b) (– 13) + (+ 18)
(c) (– 10) + (+ 19)
(d) (– 250) + (+ 150)
(e) (– 380) + (– 270)
(f) (– 217) + (– 100)

Solution:

We use the concepts of positive and negative integers and addition to add the given integers.
(a) 11 + (-7) = 11 - 7 = 4
(b) (-13) + (+18) = -13 + 18 = 5
(c) (-10) + (+19) = -10 + 19 = 9
(d) (-250) + (+150) = - 250 + 150 = -100
(e) (-380) + (-270) = -380 - 270 = – (380 + 270) = - 650
(f) (-217) + (-100) = -217 - 100 = – (217 + 100) = - 317

NCERT Solutions for Class 6 Maths Chapter 6 Exercise 6.2 Question 3

Add without using number line : (a) 11 + (– 7) (b) (– 13) + (+ 18) (c) (– 10) + (+ 19) (d) (– 250) + (+ 150) (e) (– 380) + (– 270) (f) (– 217) + (– 100)

Summary:

Adding the numbers give (a) 11 + (-7) = 4 (b) (-13) + (+18) = 5 (c) (-10) + (+19) = 9 (d) (-250) + (+150) = -100 (e) (-380) + (-270) = -650 (f) (-217) + (-100) = -317

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