Page 30 - ICSE Math 4

Exercise 3.1

1. Add the given numbers.

(a) 4,523 and 4,356 (b) 6,305 and 563 (c) 3,528 and 3,450

(d) 7,654 and 2,335 (e) 5,265; 3,504 and 220 (f) 4,308; 3,501 and 1,070

2. Find the following sums.
(a) 1,532 + 6,456 (b) 2,153 + 725 (c) 5,322 + 4,437

(d) 3,152 + 1,243 + 4,302 (e) 2,174 + 3,215 + 1,410 (f) 6,742 + 2,123 + 134

Addition of Numbers (with carry over)

Example 2: Add 4,532 and 2,798.
Solu on: Step 1: Add the ones. Th H T O
1
2 + 8 = 10 4 5 3 2
Since 10 is a 2-digit number, write 0 under + 2 7 9 8
the ones place and carry over 1 to the tens

place. 0

Step 2: Add the tens including the 1 carried over. Th H T O

1 + 3 + 9 = 13 1 1
4 5 3 2
Write 3 under the tens place and carry

over 1 to the hundreds place. + 2 7 9 8
3 0

Step 3: Add the hundreds including the 1 carried Th H T O
over. 1 1 1
4 5 3 2
1 + 5 + 7 = 13
+ 2 7 9 8
Write 3 under the hundreds place and
carry over 1 to the thousands place. 3 3 0

Step 4: Add the thousands including the 1 carried Th H T O
over. 1 1 1
4 5 3 2
1 + 4 + 2 = 7

Write the sum under the thousands place. + 2 7 9 8
So, 4,532 + 2,798 = 7,330. 7 3 3 0

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