Page 39 - Touchpad Mathematics_Ver1.0_C4

E:\Working\Orange_Education\TouchPad_Maths_4\Open_Files\Chap_02\Chap_02
\ 10-Nov-2025 Bharat Arora Proof-8 Reader’s Sign _______________________ Date __________

Example 2. Solve: 7264 – 2345 – 526

Solution. Th H T O Th H T O Tips
7 2 6 4 4 9 1 9

– 2 3 4 5 – 5 2 6 We first find the difference of 7264
4 9 1 9 4 3 9 3 and 2345 and then again find
the difference of the difference
Therefore, 7264 – 2345 – 526 = 4393. obtained and 526.

Example 3. What must be added to 67284 to get 90000?

Solution. To get the required number, we subtract 67284 from 90000 and then check
the answer.

TTh Th H T O TTh Th H T O

9 0 0 0 0 6 7 2 8 4
– 6 7 2 8 4 Checking + 2 2 7 1 6

2 2 7 1 6 9 0 0 0 0

So, 22716 must be added to 67284 to get 90000.

Example 4. What must be subtracted from 73648 to get 43000?

Solution. To get the required number, we subtract 43000 from 73648 and then check
the answer.

TTh Th H T O TTh Th H T O
7 3 6 4 8 7 3 6 4 8

– 4 3 0 0 0 Checking – 3 0 6 4 8
3 0 6 4 8 4 3 0 0 0

So, 30648 must be subtracted from 73648 to get 43000.

Example 5. The sum of two numbers is 98076. If one of the numbers is 10325, find

the other number.
Solution. To get the required number, we subtract 10325 from 98076 and then check
the answer.

TTh Th H T O TTh Th H T O
9 8 0 7 6 1 0 3 2 5
– 1 0 3 2 5 Checking + 8 7 7 5 1

8 7 7 5 1 9 8 0 7 6

Therefore, the other number is 87751.

37
Addition and Subtraction