Page 24 - Math 4

Number System Number System

c) Rounding off 385 is
300 310 320 330 340 350 360 370 380 390 400
d) Rounding off 450 is

400 410 420 430 440 450 460 470 480 490 500
Section B
3. Let's focus on the digit at ones place. Then round off the figures to the
nearest tens.

a) There are 36 students in a class. I got the rule!
Rounding off 1, 2, 3 and 4 at ones
The number in round figure is place is always to the lower tens!!
b) The cost of a book is Rs 225.

The cost in round figure is Rounding off 5, 6, 7, 8 and 9 at
ones place is always to the upper
c) The distance between Kathmandu tens!!
and Butwal is 262 km.
The distance in round figure is

d) The population of a village is 4,614.

The population in round figure is
4. Let's focus on the digit at tens place. Then, round off the figures to the
nearest hundreds.
The rule is very simple!
a) The distance between Kathmandu
Rounding off 1, 2 3 and 4 at
and Pathari is 491 km. The distance in tens place is always to the
round figure is lower hundreds!!

b) There are 715 students in a school. The
And rounding off 5, 6,
number in round figure is 7, 8 and 9 at tens place
is always to the upper
c) The price of a mobile is Rs 15,850. The
hundreds!!
price in round figure is

d) The capacity of an oil Tanker is 19,925
litres. The capacity in round figure is
5. At first, let's round off these numbers to the nearest tens. Then again
round off to the nearest hundreds.

a) Round off 218 to the nearest tens then to the nearest hundreds.

b) Round off 572 to the nearest tens then to the nearest hundreds.
c) Round off 1,655 to the nearest tens then to the nearest hundreds.
d) Round off 34,845 to the nearest tens then to the nearest hundreds.

vedanta Excel in Mathematics - Book 4 22 Approved by Curriculum Development Centre, Sanothimi, Bhaktapur