Use number line and add the following integers:
(a) 9 + (– 6)
(b) 5 + (– 11)
(c) (– 1) + (– 7)
(d) (– 5) + 10
(e) (– 1) + (– 2) + (– 3)
(f) (– 2) + 8 + (– 4)
Answer (a)
We move 9 steps to the right starting from 0 and we reach 9. Starting from 9 we move 6 steps to the left of 9. The number we get is 3.
Answer (b)
We move 5 steps to the right starting from 0 and we reach 5. Starting from 5 we move 11 steps to the left of 5. The number we get is -6.
Answer (c)
We move 1 step to the left starting from 0 and we reach -1. Starting from -1 we move 7 steps to the left of -1. The number we get is -8.
Answer (d)
We move 5 steps to the left starting from 0 and we reach -5. Starting from -5 we move 10 steps to the right of -5. The number we get is 5.
Answer (e)
We move 1 step to the left starting from 0 and we reach -1. Starting from -1 we move 2 steps to the left of -1 and we reach -3. Starting from -3 we move 3 steps to the left of 3. The number we get is -6.
Answer (f)
We move 2 steps to the left starting from 0 and we reach -2. Starting from -2 we move 8 steps to the right of -2 and we reach 6. Starting from 6 we move 4 steps to the left of 6. The number we get is 2.
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