Question

Exercise :3 (B)
(c) - 1 and - 5
(g) 5 and -8
(b) 8 and - 3
(1) 5 and - 4
(a) -7 and 4
(e) - 6 and - 1
2. Find the sum of the following:
(a) 3 and -9
(e) - 3 and 2
(b) - 6 and - 5
(f) 8 and - 4
(c) 9 and 8 8
(g) 2 and -2
(d) - 2
3. Write the additive inverse of:
(c) o
c
(b) 9
(a) -8
SUBTRACTION OF INTEGERS
al
al Subtraction of Integers
find x-y.
1. Find the sum of the following using number line :​

Answer 1

Answer:

Solution:

(a) (- 8) + (+ 5) + (- 3) + (- 2)

= (- 8) + (+ 5) – (3 + 2)

= (- 8) + (+ 5) – (5)

= (- 8) + 0 = – 8 [ ∵ (+ a) + (- a) = 0]

(b) (- 7) + (- 9) + (+ 4) + (+ 3)

= (- 7) + (- 9) + (4 + 3)

= (- 7) + (- 9) + (+ 7)

= (- 7) + (+ 7) + (- 9)

= 0 + (- 9) = – 9 [ ∵ (- a) + (+ a) = 0]