Page 35 - ICSE Math 4

3. Es mate the following sums by rounding off the addends as men oned.
(a) 946 + 2,017 + 3,406 (to the nearest 10)

(b) 4,627 + 3,781 + 1,215 (to the nearest 100)

(c) 2,875 + 6,496 + 1,324 (to the nearest 1,000)
4. A box contains 2,645 red balls; 1,378 blue balls and 1,798 green balls. How many

balls are there in the box? Also, es mate the sum by rounding off the addends to
the nearest 100.

Solving Word Problems

Example 7: Shivank deposited ` 4,550 in his account on Monday. He deposited ` 2,765 on
Wednesday and ` 3,096 on Friday. How much money did he deposit in all?

Solu on: Money deposited on Monday = ` 4,550
1 2 1
Money deposited on Wednesday = ` 2,765 4 5 5 0

Money deposited on Friday = ` 3,096 2 7 6 5

 Total money Shivank deposited in his account + 3 0 9 6
= ` 4,550 + ` 2,765 + ` 3,096 1 0 4 1 1

= ` 10,411

So, Shivank deposited a total of ` 10,411 in his account.
Framing Word Problems

So far we have learnt how to solve word problems. Now we will learn how to frame word
problems for sum of given number.
Example 8: Frame 2 word problems for 1,289 + 1,364. Top Tip

Solu on: 1. There are 1,289 students in school A and Be logical when you
1,364 students in school B. How many frame word problems.
students are there in both the schools? For example, 1,289
students in a school is
2. Raju had ` 1,289 in his account. correct whereas 1,289
He deposited ` 1,364 more. How much chips in a packet is
money does he have in his account now? incorrect.

Exercise 3.4

1. Solve the following word problems.

(a) A fl orist sold 535 roses on the fi rst day and 464 roses on the second day.
How many fl owers did he sell in two days?

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