Adding and Subtracting Decimals

Front

What is a decimal?

Back

A decimal is a number that includes a decimal point, which separates the whole number part from the fractional part. For example, 3.14 is a decimal.

Front

How do you round a number to the nearest tenth?

Back

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

Front

What is the result of 12.3 - 8.47?

Back

The result is 3.83.

Front

How do you add decimals?

Back

To add decimals, align the numbers by the decimal point and add as you would with whole numbers, placing the decimal point in the sum directly below the other decimal points.

Front

What is the cost of three items priced at $2.50 each?

Back

The total cost is $7.50.

Front

What does it mean to subtract decimals?

Back

Subtracting decimals involves finding the difference between two decimal numbers by aligning them by the decimal point and subtracting as you would with whole numbers.

Front

What is the nearest hundred to 22415.163?

Back

The nearest hundred is 22400.

Front

What is the difference between 64.81 and 2.47?

Back

The difference is 62.34.

Front

How do you round a number to the nearest whole number?

Back

To round to the nearest whole number, look at the digit in the tenths place. If it is 5 or greater, round up. If it is less than 5, round down.

Front

What is the sum of 5.5 and 3.2?

Back

The sum is 8.7.