Page 104 - ICSE Math 1

(d) 12 + 53 = (e) 84 + 11 = (f) 72 + 26 =

Tens Ones Tens Ones Tens Ones

+ + +

5. Add mentally and write True or False.

(a) 10 + 15 = 25 True (b) 16 + 20 = 46

(c) 22 + 13 = 34 (d) 43 + 30 = 73

(e) 51 + 33 = 84 (f) 62 + 24 = 87

Addition on a Number Line

Addi on on a number line means coun ng forward. Let’s learn how to add

numbers on a number line.

Look at the following example.

18 + 7 = ?

Star ng from 18, add 7 by coun ng forward and you will reach 25.

So, 18 + 7 = 25.

17 18 19 20 21 22 23 24 25 26

6. Add the given numbers on the number line.

(a) 35 + 7 =
34 35 36 37 38 39 40 41 42 43

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