Rounding and Estimation with 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. For example, rounding 2.7 to the nearest whole number gives 3.

Front

How do you round a decimal to the nearest tenth?

Back

To round a decimal to the nearest tenth, look at the hundredths place. If it is 5 or greater, round up. If it is less than 5, round down.

Front

What is estimation?

Back

Estimation is a method of finding an approximate value that is close enough to the right answer, often used when exact calculations are not necessary.

Front

Which is greater: 0.5 or 0.05?

Back

0.5 is greater than 0.05.

Front

How do you compare two decimals?

Back

To compare two decimals, align them by the decimal point and compare digit by digit from left to right.

Front

What is the value of 0.612 rounded to the nearest hundredth?

Back

0.612 rounded to the nearest hundredth is 0.61.

Front

What does it mean to round down?

Back

Rounding down means to decrease the value of a number to the nearest lower value, often used when the digit to the right is less than 5.

Front

What is the nearest tenth of 5.26?

Back

The nearest tenth of 5.26 is 5.3.

Front

If you have 0.234 and 0.243, which is larger?

Back

0.243 is larger than 0.234.

Front

What is the process of estimating a sum?

Back

To estimate a sum, round each number to a convenient value and then add those rounded numbers.