Rounding

To round with decimals you must understand place value. Review place value and the meaning of "whole number" before proceeding.

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Rounding with Decimals

Remember that the digits to the left of the decimal represent whole numbers and the digits to the right represent less than one or a fraction of a whole.

Place Value Quick Review

Underline the place value you're rounding to. Then look next door to the right. If it's five or more, add one onto the underlined number. If it's four or less, leave it alone. All the numbers after that are made into zeros or are left blank.

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​Rounding Decimals Rule:

Let's try one

Round 12.37 to the nearest tenth.

Underline the digit in the tenths place: 12.37

Look next door to the right. That number is 7. It is greater or equal to 5 so the underlined number will bump up to a 4. All the digits to the right of the tenths place are left blank.

The answer is 12.4

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Underline the digit in the tenths place. 89.14

Look next door to the right. That number is less than 5 so the underlined number stays the same. Everything to the right is left blank and your answer is 89.1

​Round 89.14 to the nearest tenths place.

Underline the digit in the hundredths place. 154.467

Look next door to the right. That digit is 5 or more so the underlined number will bump up to a 7. Your answer is 154.47 and the rest of the digits are left blank.

Round 154.467 to the nearest hundreths.

Two more.....

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Multiple Choice

Round 54.18 to the nearest tenths place.

• 54.2

• 54.1

• 54.28

• 54.18

Multiple Choice

Round 157.247 to the nearest hundredths place.

• 157.247

• 157.257

• 157.25

• 157.24

Multiple Choice

Round 12.13 to the nearest tenths place.

• 12.23

• 12.2

• 12.1

• 12.13

Multiple Choice

Round 154.6 to the nearest whole number.

• 155

• 154

• 156

• 150

Multiple Choice

Round 267 to the nearest hundred.

• 267

• 250

• 200

• 300