Page 31 - Math Skill - 5

The Four Fundamental Operations 29

Exercise 3.1

1. Write in columns and add.

(a) 1,23,43,678 and 8,76,54,321 (b) 1,63,58,296 and 61,51,06,001
(c) 37,31,80,941 and 57,43,99,782 (d) 1,65,32,612; 1,21,10,123 and 5,11,23,002

2. Do as instructed.

(a) Find the number which is 35,28,362 more than 6,63,18,961.
(b) Find the number which is 6,12,35,186 more than 35,23,689.
(c) Find the sum of 24,16,736 and the number formed by reversing its digits.

3. Fill the missing digits.

(a) 1 1 4 8 (b) 1 9 7

+ 7 3 5 3 8 + 7 1 3 1 3

8 4 2 6 0 1 2 2 0 1 1 5

Subtraction

You have studied the subtraction of numbers of up to 6-digits in earlier classes. Now, move
further to take same rules on larger numbers.
Let’s recall the steps involved in subtraction.

Step 1: We arrange the given numbers in columns, ones under ones, tens under tens,
hundreds under hundreds and so on.

Step 2: Beginning with the ones, we go on subtracting column-wise, borrowing if necessary,
from the next column to the left.

Subtraction without Regrouping

Let’s learn through example given below.

Let’s Attempt

Example: Subtract 2,35,28,214 from 5,89,69,675.

Solution: 5 8 9 6 9 6 7 5 (Minuend)
– 2 3 5 2 8 2 1 4 (Subtrahend) The difference of the given
3 5 4 4 1 4 6 1 (Difference) numbers is 3,54,41,461.

Subtraction with Regrouping

Let’s learn through example given below.