Page 1 - Assignment 10

Subject – Mathematics

Chapter 2 – OPERATION ON LARGE NUMBERS

Sub-topic 10 : Estimating Operations

Practice Time:

SUBJECTIVE QUESTIONS:

1. Estimate the sum 78907 and 65432 by rounding off them to the nearest 1000.
2. Find out the actual difference between 16709 and 87603 and then estimate the
difference by rounding off them to the nearest 100.
3. Estimate the product of 7654 and 45.
4. Find the actual quotient of 12985 and 23 and then estimate the quotient.
5. Estimate the total number of chocolates, if Hari has 3456 chocolates and Shyam
has 9812 chocolates by rounding them off to the nearest 100.

OBJECTIVE QUESTIONS:
1. In 1999, the population of Capital City was 7,255,831 and the population of Spring
City was 3,942,652. Round each population to the nearest hundred-thousand to
estimate the difference in the populations of the two cities.

a) 3,400,000

b) 3,500,000

c) 3,313,000

d) 3,300,000

2. The Pan family took a trip and travelled 87, 165, 449, 439, 598, and 560 miles on 6
consecutive days. Round each distance to the nearest hundred to estimate the distance
they travelled.

a) 2400 miles

b) 2200 miles

c) 2300 miles

d) 2500 miles

3. Enrollment figures at a community college showed an increase from 43,580 credit
hours in 2005 to 89,292 credit hours in 2006. Round each number to the nearest
thousand to estimate the increase.