Rounding to the Nearest Hundred
When we round to the nearest hundred, the numbers “residing” in the red areas (up to 850) on the number line are rounded to 800. The numbers in the blue areas are rounded to 900.
Again, distance matters. Numbers from 801 to 849 are closer to 800 than
to 900. 
1. Mark the numbers as dots on the number line (approximately) and round them to either 800 or 900.
a. 804 ≈ ____________ 859 ≈ ____________ 
b. 825 ≈ ___________ 850 ≈ ___________ 
c. 860 ≈ ___________ 847 ≈ ___________ 
d. 808 ≈ ___________ 892 ≈ ___________ 
When rounding to the nearest hundred, look at the TENS DIGIT of the number.


728
≈ ? The tens digit is 2,
so round down:
728 ≈ 700 
471
≈ ? The tens digitis 7,
so round up: 471 ≈ 500 
956
≈ ? The tens digit is 5,
so round up: 956 ≈ 1000 
2. Round these numbers to the nearest hundred.
a. 416 ≈ ___________ 837 ≈ ____________ 
b. 529 ≈ ___________ 960 ≈ ___________ 
c. 670 ≈ ___________ 557 ≈ ___________ 
d. 254 ≈ ___________ 147 ≈ ___________ 
Things work similarly on this number line when rounding to the nearest hundred:

3. Round these numbers to 2,400 or to 2,500. You can use the number line above to help you.
a. 2,412 ≈ __________  b. 2,429 ≈ __________ 
c. 2,478 ≈ ___________  d. 2,490 ≈ ___________ 
Rounding rules When rounding to the nearest hundred, look at the TENS DIGIT of the number. 
If the tens digit is 0, 1, 2, 3, or 4, you will round down to the previous hundred. 728 ≈ ? The tens digit is 2, so round down: 728 ≈ 700 Notice: the hundreds digit does not change. 
If that digit is 5, 6, 7, 8, or 9, you will round up to the next hundred. 471 ≈ ? The tens digit is 7, so round up: 471 ≈ 500 Notice: the hundreds digit increases by one, from 4 to 5. 
Whether you round up or down, the tens and ones digits change to zeros. 
4. Round these numbers to the nearest hundred.
a. 6,216 ≈ _________  b. 5,923 ≈ _________ 
c. 1,670 ≈ _________  d. 8,254 ≈ _________ 
e. 8,019 ≈ _________  f. 2,157 ≈ _________ 
g. 1,772 ≈ _________  h. 6,849 ≈ _________ 
i. 801 ≈ _________  j. 255 ≈ _________ 
k. 9,562 ≈ _________  l. 3,501 ≈ _________ 
Note especially! 4,952 ≈ ? Now the tens digit is 5, so we round up. The hundreds digit (9) increases by one (to ten hundreds). But we can't change 9 to 10 or we would get 41052! Instead, those ten hundreds make a new thousand, so the thousands digit is incremented by one. It is as if '49' changes to '50'. So, we get 4,952 ≈ 5,000 
5. Round these numbers to the nearest hundred.
a. 6,986 ≈ _________  b. 5,973 ≈ _________ 
c. 1,981 ≈ _________  d. 4,945 ≈ _________ 
e. 2,932 ≈ _________  f. 9,969 ≈ _________ 
g. 966 ≈ _________  h. 9,982 ≈ _________ 
i. 798 ≈ _________ 
6. Round these numbers to the nearest hundred.
Place each answer in the crossnumber puzzle.


7. Fill in, using rounded numbers.
a. Usually, Mary receives about __________ spam emails daily, but on 5/9 she got about ___________ spams.
b. During the work week from 5/7 till 5/11 she received about __________ spams.
Spam Emails Mary Received 

Date  Spams  round to nearest 100 
Mo 5/7  125  
Tu 5/8  97  
Wd 5/9  316  
Th 5/10  118  
Fr 5/11  106 
See also
Free rounding worksheets
Generate free printable worksheets for rounding whole numbers for grades 26. The worksheets are customizable, randomly generated each time, and available as PDF or html files.