Page 53 - ICSE Math 2

(g) 32 + 6 + 61 (h) 2 + 53 + 32 (i) 22 + 41 + 31

T O T O T O

+ + +

Brainwork

Add mentally and write the answer.

(a) 30 + 21 + 12 = (b) 13 + 43 + 20 =

(c) 25 + 11 + 50 = (d) 61 + 15 + 10 =

(e) 40 + 30 + 20 = (f) 25 + 30 + 12 =

Addition Using Carry Over Method

Look at the steps we follow to add two 2-digit numbers with carry over.

Let’s add 56 and 27.

T O
Step 1: Add the ones.
5 6

6 + 7 = 13
+ 2 7

13

T O
1 Step 2: 13 is a 2-digit number. Write 3 in the ones
5 6
place and carry over 1 to the tens place. Add

+ 2 7 the tens including the 1 carried over.

8 3 1 + 5 + 2 = 8

So, 56 + 27 = 83.

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