Class 06 Adding integers on the number line

 ACTIVITY INTEGERS

Objective: 

Adding integers on the number line

Materials Required :

Some sheets of paper, pen sketch pen, pencil, etc.,

Procedure :

To add two positive integers (say +5 and +8)

Using sketch pen, draw a number line as shown below:

   |     |      |    |     |     |     |     |    |    |    |    |    |     |    |    |    |     |    |

-3   -2   -1   0    1    2    3   4    5  6   7   8   9  10 11 12 13 14 15

Start from 0 and move 5 steps towards right to reach at 5.

3. From 5, move 8 steps towards right to reach at 13.  Thus, (+ 5) + (+ 8) = + 13 or 13.

ACTIVITY INTEGERS

II. To add a positive integer and a negative integer (say + 4 and-7)

Draw a number line as shown below:

2. Start from 0 and move 4 steps towards right to reach at 4.

3. From 4, move 7 steps towards left to reach at -3. Thus, 4 + (-7) =-3.

ACTIVITY INTEGERS

III. To add two negative integers (say -3 & -5)

To Draw add two a number negative line integers as shown (say below-3: and-5)

2. Start from 0 and move 3 steps towards left to reach at -3.

 3. From-3, move 5 steps towards left to reach at-8. Thus, (-3) + (-5) = -8.

Do Yourself : 

Using the number line add:

(+ 2) + (+ 8) 2.-4 + (+6) 3. (+ 8) + (-7) 4. (+6) + (-2) 5. (-5) + (-7) 

6. (-8) + (-2) + (+4)