Name ___________________________________ Date ________ Periods _______
Rounding Whole Numbers (textbook pages 10-11)
Parent reminder: If you help your child with a problem, please circle the problem number.
Round each number to the underlined place value.
1.) 261,798 _________________________
2.) 8,389,102 ___________________________
3.) 12,387 __________________________
4.) 472 _________________________
5.) 83,125 ___________________________
Answer each question. Think them through carefully!! 
6.) You are planning to buy a video game system. It costs $174.99. To which
place value would you round this cost to be fairly sure you will have enough
money to pay for the video game system? __________________________
7.) It takes the planet Neptune 60,268 Earth days to orbit the sun once. How
many days is that to the nearest ten thousand? ________________________
8.) Create a number that will round to 11,000. Then number you create can not
contain any zeros. ___________________________
9.) There are 314 Hershey kisses in an extra large bag. How many kisses is that
to the nearest 100? __________________________ How many kisses is that
to the nearest 10? __________________________
Challenge:
1.) It takes 3 digits to write the number 100. How many digits would it take to
write the numbers from 1 through 300? (Be able to explain your answer.)
_________ digits
2.) Can you name a 4-digit number where the last digit is the sum as well as the
product of the first three digits? __________________
(Example: 1,236 → 1 + 2 + 3 = 6 and 1 x 2 x 3 = 6)
Today we talked about rounding whole numbers.
Steps for rounding:
Step 1: Underline the place value you are rounding to. Example: 1,689 to the
nearest hundred
Step 2: If there are digits to the left of the underlined number, they will stay in
your answer. Example: the 1 will remain in the thousands place
Step 3: Look at the digit to the right of the underlined digit. If that digit is 0, 1, 2, 3,
or 4, keep the underlined digit the same. If the digit is 5, 6, 7, 8 or 9, round up by
increasing the underlined digit by one. Example: 1,689 The 6 has an 8 beside it so
I should round the 6 up to 7.
Step 4: Change all of the digits to the right of the underlined place to zero.
Example: 1,689 rounds to 1,700
Another way to think about it:
1,689 comes between 1,600 and 1,700. It is closer to 1,700 so it rounds to 1,700.
(1,650 is halfway between 1,600 and 1,700 so all numbers from 1,650 to 1,700
would round to 1,700.)
If the number that is rounding up is a 9…….
Example: 2,951 to the nearest hundred – There is a 5 to the right of the hundreds
place which is 9. When I increase the 9, I cannot write a ten in a single place value.
You must increase the place value to the left of the underlined number….so the 29
becomes a 30. The answer is 3,000.