Page 43 - Start Up Mathematics_1
P. 43
(d) + + =
(e) + + =
10 Add the numbers.
(a) 3 + 2 + 4 = (b) 1 + 3 + 2 =
(c) 2 + 1 + 4 = (d) 3 + 1 + 1 =
(e) 2 + 4 + 2 = (f) 1 + 3 + 5 =
Little Genius!
Fill in the missing numbers.
(a) 1 + 1 + = 9 (b) + 1 + 4 = 7
(c) 6 + 1 + = 8 (d) + 1 + 5 = 6
Addition of Three Numbers on a Number Line
Just like two numbers, we can also add three numbers on a number line.
First add two numbers on the number line. Then starting from the answer, count
forward the third number. You will get the answer.
Look at the example, 2 + 3 + 4 = ?
Starting from 2, add 3 by counting forward and you will reach 5. Now from 5,
count forward 4. You will reach 9 which is the answer.
So, 2 + 3 + 4 = 9.
0 1 2 3 4 5 6 7 8 9
35
