Page 32 - ICSE Math 4

Exercise 3.2

1. Add the given numbers.

(a) 5,937 and 2,498 (b) 7,987 and 1,532

(c) 8,423; 542 and 1,532 (d) 2,685; 1,340 and 2,139

(e) 2,617; 3,872 and 2,643 (f) 2,843; 1,389 and 5,204

2. Find the following sums.

(a) 2,971 + 4,532 (b) 3,237 + 1,085 + 4,827

(c) 1,326 + 2,108 + 4,046 (d) 2,658 + 2,196 + 529

(e) 3,013 + 1,580 + 607 (f) 3,452 + 1,673 + 4,453

3. Write the given numbers as the sum of two and three numbers in diff erent ways.

(a) 5,429 (b) 1,270

Addition Using Expanded Form

To add numbers using the expanded form, we follow the given steps.

• Write each number in the expanded form.

• Add the values at each place.

• Find the sum of the added values.

Example 4: Add 5,798 and 3,543 using the expanded form.

Solu on: Th H T O Expanded form Th H T O

5 7 9 8 5000 + 700 + 90 + 8 8 0 0 0

+ 3 5 4 3 + 3000 + 500 + 40 + 3 1 2 0 0

8000 + 1200 + 130 + 11 1 3 0

+ 1 1

9 3 4 1
So, 5,798 + 3,543 = 9,341.

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