NCERT Class 6 Mathematics Sixth Chapter Integers Exercise 6.2 Solution
EXERCISE 6.2
(1) Using the number line write the integer which is:
(a) 3 more than 5
Ans: 3 + 5 = 8
(b) 5 more than –5
Ans: 5 + (- 5) = 0
(c) 6 less than 2
Ans: 2 – 6 = – 4
(d) 3 less than –2
Ans: – 2 – 3 = – 5
(2) Use number line and add the following integers:
(a) 9 + (– 6)
= 9 – 6
= 3
(b) 5 + (– 11)
= 5 – 11
= – 6
(c) (– 1) + (– 7)
Ans: – 1 – 7
= – 8
(d) (– 5) + 10
= – 5 + 10
= 5
(e) (– 1) + (– 2) + (– 3)
= – 1 – 2 – 3
= – 6
(f) (– 2) + 8 + (– 4)
= – 2 + 8 – 4
= 8 – 6
= 2
(3) Add without using number line:
(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
= – 650
(f) (– 217) + (– 100)
= – 217 – 100
= – 317
(4) Find the sum of:
(a) 137 and – 354
= 137 + (- 354)
= 137 – 354
= – 217
(b) – 52 and 52
= – 52 + 52
= 0
(c) – 312, 39 and 192
= – 312 + 39 + 192
= – 312 + 231
= – 81
(d) – 50, – 200 and 300
= – 50 + (- 200) + 300
= – 50 – 200 + 300
= – 250 + 300
= 50
(5) Find the sum:
(a) (– 7) + (– 9) + 4 + 16
= – 7 – 9 + 4 + 16
= – 16 + 20
= 4
(b) (37) + (– 2) + (– 65) + (– 8)
= 37 – 2 – 65 – 8
= 37 – 67 – 8
= 37 – 75
= – 38
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