Decimal Operations Review

Front

What is a decimal?

Back

A decimal is a fraction expressed in a special form. It uses a decimal point to separate the whole number part 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 product of two decimals?

Back

The product of two decimals is found by multiplying the numbers as if they were whole numbers, then placing the decimal point in the product based on the total number of decimal places in the factors.

Front

How do you subtract decimals?

Back

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

Front

What is the value of 0.5 + 0.3?

Back

0.5 + 0.3 = 0.8.

Front

What is the value of 0.75 - 0.25?

Back

0.75 - 0.25 = 0.50.

Front

How do you divide decimals?

Back

To divide decimals, move the decimal point in the divisor to make it a whole number, and move the decimal point in the dividend the same number of places. Then divide as you would with whole numbers.

Front

What is the value of 0.4 × 0.25?

Back

0.4 × 0.25 = 0.1.

Front

If a product of two decimals is 1.5, what could one of the decimals be if the other is 0.5?

Back

If one decimal is 0.5, the other decimal must be 3.0 because 0.5 × 3.0 = 1.5.

Front

What is the value of 0.5 × 3.5?

Back

0.5 × 3.5 = 1.75.