Adding and Subtracting Decimals

Front

What is a decimal?

Back

A decimal is a fraction whose denominator is a power of ten, represented with a dot (decimal point) separating the whole number from the fractional part.

Front

How do you add decimals?

Back

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

Front

What is the process for subtracting decimals?

Back

To subtract decimals, align the numbers by the decimal point, subtract as you would whole numbers, and place the decimal point in the difference directly below the other decimal points.

Front

What is the value of 0.5 in fraction form?

Back

0.5 is equivalent to 1/2.

Front

How do you convert a decimal to a fraction?

Back

To convert a decimal to a fraction, write the decimal over 1, multiply the numerator and denominator by 10 for each digit after the decimal point, and simplify if possible.

Front

What is the sum of 21 and 4.09?

Back

The sum of 21 and 4.09 is 25.09.

Front

What is the result of 55.78 + 4.6?

Back

The result of 55.78 + 4.6 is 60.38.

Front

What is the difference when you subtract 68 from 80.93?

Back

The difference is 12.93.

Front

If Kelly has $20 and spends $2.15 and $6.58, how much does she have left?

Back

Kelly has $11.27 left.

Front

What is 9.43 minus 3.34?

Back

9.43 minus 3.34 equals 6.09.