Rounding Decimals

Front

What is rounding in mathematics?

Back

Rounding is the process of adjusting the digits of a number to make it simpler while keeping its value close to what it was. It often involves increasing or decreasing the last digit based on the value of the digits that follow it.

Front

What does it mean to round to the nearest whole number?

Back

Rounding to the nearest whole number means adjusting a decimal number to the closest integer. If the decimal is .5 or higher, the number is rounded up; if it is less than .5, it is rounded down.

Front

How do you round a number to the nearest tenths?

Back

To round a number to the nearest tenths, look at the digit in the hundredths place. If it is 5 or greater, increase the tenths place by 1. If it is less than 5, keep the tenths place the same.

Front

What is the rule for rounding to the nearest hundredths?

Back

To round to the nearest hundredths, examine the digit in the thousandths place. If it is 5 or greater, increase the hundredths place by 1. If it is less than 5, leave the hundredths place unchanged.

Front

Round 113.899 to the nearest tenths.

Back

113.9

Front

Round 29.215 to the nearest whole number.

Back

29

Front

Round 9.715 to the nearest hundredths.

Back

9.72

Front

What is the result of rounding 19.663 to the nearest whole number?

Back

20

Front

Explain why rounding 19.663 to 29 is incorrect.

Back

Rounding 19.663 to the nearest whole number results in 20, not 29, because the decimal .663 is greater than .5.

Front

What is the significance of the digit after the place value you are rounding to?

Back

The digit after the place value you are rounding to determines whether to round up or down. If it is 5 or greater, you round up; if it is less than 5, you round down.