Rounding Decimal Numbers

Rounding Decimals

Rounding Decimals

Rounding decimals is just like rounding whole numbers!

When you round a decimal, you find the place you want to round to and look at the number behind it (to the right).

For example...

Round 4.86 to the nearest...

tenths

ones​

​

Rounding Decimals

4.86 rounds to 4.9 or 4.90 (nearest tenth)

4.86 rounds to 5 or 5.0 or 5.00 (nearest whole/ones)​

​

Try some on your own...​

Multiple Choice

Round 8.27 to the nearest tenth.

• 8.37

• 8.2

• 8.3

• 8

Multiple Choice

Round 45.833 to the nearest hundredth.

• 45.800

• 45.830

• 45.900

• 45.833

Multiple Choice

Round 89.36 to the nearest ones.

• 89

• 90

• 89.4

• 90.36

Multiple Choice

Round 2.88 to the nearest tenth.

• 2.90

• 2.98

• 3

• 2.88

Multiple Choice

Round 76.238 to the nearest hundredth

• 76.200

• 76.24

• 76.248

• 76.23

Multiple Choice

Can 45.67 be rounded to the nearest hundredth?

• yes

• no

Multiple Choice

Round 90.763 to the nearest ones place.

• 90

• 90.8

• 91

• 91.763

Multiple Choice

Round 0.337 to the nearest hundredths place.

• 0.300

• 0.400

• 0.33

• 0.34

Multiple Select

Julia recorded the amount of rainfall for the month of September and then rounded it to the nearest hundredth of an inch. Julia’s number rounded to 6.4 inches. Which numbers could be the original number Julia recorded?

• 6.395

• 6.427

• 6.403

• 6.408

• 6.393

Open Ended

The table below shows the scores for the women’s gymnastics competition at the 2008 Beijing Olympics:

When rounded to the nearest tenth, which gymnast had a total score of 16?

Multiple Choice

A carpenter was building a toy box and used a piece of plywood that was about 4.565 feet long. What is this number rounded to the nearest tenth?

• 4.56

• 4.60

• 4.57

• 4.66

Multiple Choice

Khloe wrote a number and then rounded it to 6.39. Which of the following numbers could be the original number Khloe wrote?

• 6.382

• 6.398

• 6.385

• 6.309

Open Ended

Michael’s dad was building a raised garden in his backyard and used wooden boards that were about 9.638 feet in length. What is this number rounded to the nearest tenths place?