Page 51 - Revised Maths Wisdom Class - 3

Subtracti on of 4-Digit Numbers 49

Step 2: In tens column, 7 tens becomes 6 tens aft er borrowing. Th H T O

6 tens – 6 tens = 0 6 13
7 8 7 3
Write 0 under tens column. – 4 9 6 8

Step 3: In hundreds column, 8 < 9, 0 5
we borrow 1 thousand from thousands column.

1 thousand + 8 hundreds Th H T O

= 10 hundreds + 8 hundreds 18 6 13

= 18 hundreds – 7 8 7 3
9
6
4
8
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18 hundreds – 9 hundreds = 9 hundreds 9 0 5
Write 9 under hundreds column.
Step 4: In thousands column, we are left with 6 thousands. Th H T O
6
6 thousands – 4 thousands = 2 thousands 6 18 7 13
3
7
8
Write 2 under thousands column. – 4 9 6 8
Hence, the diff erence is 2905. 2 9 0 5

Example 2: Find the diff erence between Example 3: Subtract 4379 from 8785.
9500 and 3784. Solution: Th H T O

Solution: Th H T O 7 15

8 14 9 10 8 7 8 5
4 10 – 4 3 7 9
9 5 0 0 4 4 0 6
– 3 7 8 4

5 7 1 6

Checking Subtraction using Addition

We can easily check the subtraction using the concept of addition.

Let us subtract 2623 from 4532 and check our answer.

Subtraction Checking the answer
We subtract 2623 from 4532 and get
Th H T O Th H T O the diff erence as 1909.
4 5 3 2 1 9 0 9
– 2 6 2 3 + 2 6 2 3 It also means that if we add 1909

1 9 0 9 4 5 3 2 and 2623 we get the sum as 4532.
Therefore, we can say that addition
and subtraction are related to each

other.