Decimal Operations Review

Front

What is a decimal?

Back

A decimal is a fraction whose denominator is a power of ten, represented with a decimal point. For example, 0.5 is a decimal representation of the fraction 1/2.

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 result directly below the other decimal points.

Front

How do you multiply decimals?

Back

To multiply decimals, multiply the numbers as if they were whole numbers, then count the total number of decimal places in both factors and place the decimal point in the product accordingly.

Front

What is the rule for dividing decimals?

Back

To divide decimals, move the decimal point in the divisor to the right until it is a whole number, then move the decimal point in the dividend the same number of places. Perform the division as usual.

Front

What is the sum of 7.14 and 12.9?

Back

The sum of 7.14 and 12.9 is 20.04.

Front

What is the difference between 13.9 and 0.77?

Back

The difference between 13.9 and 0.77 is 13.13.

Front

What is 1.04 multiplied by 8.3?

Back

1.04 multiplied by 8.3 equals 8.632.

Front

What is the total weight of twins weighing 107.2 ounces and 112.8 ounces?

Back

The total weight of the twins is 220 ounces.

Front

What is 23.8 minus 6.49?

Back

23.8 minus 6.49 equals 17.31.