Page 28 - Math Skill - 4

26 Maths

(e) 53213 + 2000 = _______ (f) 2815 + 30 = _______

(g) 834215 + 1000 = _______ (h) _______ + 82810 = 82810 + 52451
(i) (44267 + 59282) + 2854 = 44267 + (59282 + _______)
2. Add the following pairs and compare their sums.

(a) 43543 + 16253 and 16253 + 43543 (b) 33560 + 678336 and 678336 + 33560

Word Problems

Let us learn how to solve word problems on addition with the help of some examples.

Let’s Attempt

Example 1: 17528 tiles are needed for tiling all the three floors of a house and 1689 tiles are
required for tiling the verandah. How many tiles are required in all?
Solution: Tiles required for all the floors = 17528 TTh Th H T O

Tiles required for the verandah = 1689 1 1 1
Total number of tiles required = 17528 + 1689 1 7 5 2 8
= 19217 + 1 6 8 9

Thus, 19217 tiles are needed in all. 1 9 2 1 7

Example 2: The total number of enrolments in all the schools of a district during a year was
223782 and during the next year, it was 331263. Find the total enrolments in both
the years.
Solution: Enrolments during first year = 223782 L TTh Th H T O
Enrolments during second year = 331263 1 1

Combined enrolments of the two years 2 2 3 7 8 2
= 223782 + 331263 = 555045 + 3 3 1 2 6 3

Thus, together in the two years, total number of 5 5 5 0 4 5
enrolments was 555045.

Exercise 2.3

1. In a state, there are 12756 teachers below the age of 35 years and 3535 teachers above the
age of 35. Find the total number of teachers in the state.

2. A town has 17875 males and 15618 females. Find the total population of the town.

3. In a school library, there were 325128 books. During the new session, 43685 books are
added. What is the total number of books in the library now?
4. A number is 15628 more than 79528. Find that number.
5. Find the sum of the greatest and the smallest 5-digit numbers that can be formed from the
digits 6, 2, 3, 8 and 0.