Page 17 - Maths Class 04
P. 17
Carry On
Order the numbers from greatest to least.
1. 2.
Thousands Ones Thousands Ones
674, 509 818, 239
183, 242 874, 391
706, 185 Hundreds Hundreds 830, 076 Hundreds Hundreds
841, 705 Tens Ones Tens Ones 343, 443 Tens Ones Tens Ones
greatest-> greatest->
least-> least->
Rounding Off Numbers
We round off numbers to estimate the figures or amounts.
When we are talking about the crowd of people watching a movie in a
theatre, we may say, ‘about 700 people are watching the movie.’ The actual
number could be 748 or 719 or anything else about near 700.
Rounding Off to the Nearest 10
While rounding off the number to the nearest 10.
« First of all we find, between which two tens, the number lies.
Look at the number line. See how rounding off works on the number line.
40 41 42 43 44 45 46 47 48 49 50
« If the digit at ones place is less than 5, do not change the tens, but put
zero at ones place.
43 is rounded off to 40 as it is closer to 40 than 50.
« If the digit at ones place is 5 or greater than 5, add 1 to the digit at tens
place and write zero at ones place.
48 is rounded off to 50 as it is closer to 50 than 40.
Mathematics-4 17
