Page 40 - 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 __________

21 st
Activity Century #Experiential Learning
Skills

Fun with addition and subtraction
Take any 4-digit number. Example: 6249
Mix up the digits at random. 2496

Subtract the smaller number from the greater number. 6249 – 2496 = 3753
Add the digits of the difference. 3 + 7 + 5 + 3 = 18
If you get a two-digit number, add those. 1 + 8 = 9

Try this with some other 4-digit numbers. What do you get?

Exercise 2G

1. Solve the following:

a. 617 + 358 – 234 b. 5243 + 3648 – 1764

c. 2436 – 3645 + 7231 d. 4360 – 864 + 1355
e. 8436 – 2436 – 1543 f. 9750 – 2480 – 975

g. 9000 – 4500 – 3245 h. 5000 + 476 – 2136
2. Find the number which is
a. 272 more than 7364 b. 1545 more than 20978

c. 784 less than 3695 d. 2543 less than 93650
3. What should be added to

a. 2785 to get 5000? b. 736 to get 5640?
c. 4537 to get 97364? d. 5346 to get 10000?

4. What should be subtracted from
a. 93643 to get 2714? b. 50000 to get 3772?

c. 65348 to get 9999? d. 9736 to get 4761?
5. The capacity of Eden Gardens stadium is 65507. If during a cricket match, 15,942
people entered before noon and 14940 after noon, how many more people can enter

the stadium till it is filled to capacity?
6. On Sunday, 10250 men, women and children visited the Book Fair. There were 4275
men, 3549 women and the rest were children. Find the number of children who visited
the Book Fair.

38 Mathematics 4