Add and Subtract Decimals

Front

What is the process for adding decimals?

Back

To add decimals, align the numbers by the decimal point, add zeros if necessary to make the numbers the same length, and then add as you would with whole numbers, placing the decimal point in the sum directly below the aligned decimal points.

Front

What is the process for subtracting decimals?

Back

To subtract decimals, align the numbers by the decimal point, add zeros if necessary to make the numbers the same length, and then subtract as you would with whole numbers, placing the decimal point in the difference directly below the aligned decimal points.

Front

How do you determine the place value of a decimal number?

Back

The place value of a decimal number is determined by the position of each digit relative to the decimal point. To the left of the decimal, the values are whole numbers (units, tens, hundreds, etc.), and to the right, the values are fractions (tenths, hundredths, thousandths, etc.).

Front

What is the value of 0.5 in fraction form?

Back

0.5 in fraction form is 1/2.

Front

How do you convert a decimal to a percentage?

Back

To convert a decimal to a percentage, multiply the decimal by 100 and add a percent sign. For example, 0.75 becomes 75%.

Front

What is the sum of 0.1 and 0.2?

Back

The sum of 0.1 and 0.2 is 0.3.

Front

What is the difference between 3.5 and 1.2?

Back

The difference between 3.5 and 1.2 is 2.3.

Front

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

Back

To round a decimal to the nearest whole number, look at the digit to the right of the decimal point. If it is 5 or greater, round up; if it is less than 5, round down.

Front

What is the result of adding 12.34 and 23.45?

Back

The result of adding 12.34 and 23.45 is 35.79.

Front

What is the result of subtracting 8.32 from 15.67?

Back

The result of subtracting 8.32 from 15.67 is 7.35.