Page 36 - Maths Skill - 3

34 Maths

2. Find the sum of the given numbers.

(a) 4128 and 3128 (b) 3127 and 4878 (c) 6138 and 2739

(d) 3415 and 2389 (e) 3789 and 1309 (f) 6318 and 2379

Addition of more than Two Numbers

Let us add 4238, 1238 and 325.

Arrange the given numbers in columns and then follow these steps:
Step 1: Add the ones. Th H T O

8 ones + 8 ones + 5 ones = 21 ones 4 2 2 8
3
21 ones = 2 tens + 1 one 1 2 3 8

Write 1 under the ones column and carry over + 3 2 5
2 tens to the tens column. 1

Step 2: Add the tens. Th H T O

3 tens + 3 tens + 2 tens + 2 tens (carried over) = 10 tens 1 2

10 tens = 1 hundred + 0 tens 4 2 3 8
8
3
2
1
Write 0 under tens column and carry over 1 hundred to + 3 2 5
the hundreds column. 0 1
Step 3: Add the hundreds. Th H T O

2 hundreds + 2 hundreds + 3 hundreds 1 2
+ 1 hundred (carried over) = 8 hundreds 4 2 3 8
8
1
2
3
Th H T O + 3 2 5
1 2 8 0 1
4 2 3 8 Step 4: Add the thousands.
1 2 3 8
+ 3 2 5 4 thousands + 1 thousand = 5 thousands
5 8 0 1 Thus, 4238 + 1238 + 325 = 5801

Exercise 3.5

1. Add the following.

(a) Th H T O (b) Th H T O (c) Th H T O

1 8 7 3 3 4 6 8 2 6 5 3
2 5 7 6 2 0 8 9 1 1 1 1
+ 3 8 2 + 1 3 8 2 + 2 3 5 9