Page 44 - Start Up Mathematics_1

Look at another example, 2 + 1 + 5 = ?

Starting from 2, add 1 by counting forward and reach 3. Then from 3, count

further 5 and reach 8.

So, 2 + 1 + 5 = 8.

0 1 2 3 4 5 6 7 8 9

11 Add the numbers on the number line.

(a) 2 + 0 + 4 =
0 1 2 3 4 5 6 7 8 9

(b) 1 + 3 + 4 =
0 1 2 3 4 5 6 7 8 9

(c) 5 + 2 + 1 =

0 1 2 3 4 5 6 7 8 9

(d) 0 + 6 + 3 =
0 1 2 3 4 5 6 7 8 9

(e) 4 + 2 + 3 =
0 1 2 3 4 5 6 7 8 9

Vertical Method of Addition

We can add numbers by vertical method. In this method, we write one number

below the other and add.

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