Page 48 - Math Genius C4

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\\September 30, 2025 9:38 AM Bharat Arora P-9 Reader _________________________ Date: ___________________74

example 2: Solve: 43,268 – 11,426 + 21,635 – 35,760
Solution: Step 1: Add the numbers having Step 2: Add the numbers having

+ sign. – sign.
tth th H T O tth th H T O

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

Step 3: Subtract the sum obtained in step 2 tth th H T O
from the sum obtained in step 1. 9

5 14 8 10 13
6 4 9 0 3
– 4 7 1 8 6
1 7 7 1 7

Thus, 43,268 – 11,426 + 21,635 – 35,760 = 17,717.

Practice time 2g

1. Solve the following:

(a) 32,617 + 11,358 – 23,471 (b) 45,243 + 13,648 – 17,647

(c) 72,436 – 43,645 + 72,310 (d) 2,19,000 – 1,45,001 + 32,451

(e) 2,71,409 – 4,67,521 – 1,10,216 + 3,89,899

2. An auditorium can accommodate 65,507 persons. If during a conference, 15,942

people entered before noon and 14,940 after noon, find out how many more

people can sit in the auditorium now?

3. On Sunday, 10,250 men, women and children visited the National Museum. There
were 4275 men, 3549 women and the rest were children. Find the number of

children who visited the National Museum.

Challenge Question Critical Thinking
Social Emotional Learning
Three housing societies collected donations for the earthquake
victims. The first society collected `56,987 while the second society collected `3,452
more than the first society and the third society collected `6,981 less than the first
society. Calculate the total donation amount.

46 Mathematics-4