Page 47 - MathGPT_V1.0_C5

D:\Surender Prajapati\Books Final_CBSE and ICSE\ICSE\Preparatory_Stage_Maths-5_(31-10-2023)\Open_Files\CHAP_02
\\November 3, 2023 10:57 AM Surender Prajapati Proof 5 Reader _________________________ Date: ___________________74

3. Fill in the blanks.
(a) 789 ÷ 789 = ______ (b) 5342 ÷ ______ = 5342 (c) ______ ÷ 6574 = 1

(d) ______ ÷ 218 = 0 (e) If 4032 ÷ 24 = 168, then 24 × 168 = ______

4. Match the following columns:
Column-I Column-II

(a) 54363 ÷ 10 (i) Q = 430, R = 33
(b) 43033 ÷ 100 (ii) Q = 487, R = 6
(c) 921735 ÷ 1000 (iii) Q = 5436, R = 3
(d) 55569 ÷ 100 (iv) Q = 697, R = 770
(e) 4876 ÷ 10 (v) Q = 921, R = 735
(f) 697770 ÷ 1000 (vi) Q = 555, R = 69

5. Solve the following word problems.

(a) The cost of 130 radio sets is `299520. What is the cost of one radio set?
(b) The product of two numbers is 332878. If one of the numbers is 826, find the
other number.

(c) School children in Delhi collected `98762 for flood-affected people. This is to be
distributed among 437 people equally. How much does each person get?

(d) A wholesale supplier sold 349300 kg of mangoes in boxes last year. How many
boxes did he use throughout the year if there were 35 kg of mangoes in each
box?

ESTIMATION IN OPERATIONS

We have learnt in our previous chapter how to round
off a number to a certain place. Remember

To round off a number, we look at the digit to the A number can be rounded off to
right of the place to which you are rounding. any place according to the situation.
But the estimated answer should be
If the digit is 5 or greater, round up. close to the actual answer.

If the digit is less than 5, round down.
Example: Rounding off 568 to the nearest hundred 600

Rounding off 8177 to the nearest thousand 8000

Rounding off 28139 to the nearest ten thousand 30000
Rounding off 150000 to the nearest lakh 200000

Sometimes in real life situations, we need a quick answer. In such situations estimation helps.
Sometimes, the actual addition, subtraction, multiplication or division of the numbers takes

more time to calculate. In these cases, we find the estimated sum, difference, product, or
quotient by rounding off the numbers to the nearest tens, hundreds, thousands and so on.

Mathematics-5 45