Decimal Operations

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

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 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 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 cost of 1 pound of trail mix if 3.9 pounds cost $11.61?

Back

$2.99 per pound.

Front

How do you divide 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 to the right and divide as usual.

Front

What is the difference between 7.7 and 2.93?

Back

4.77.

Front

If a car travels 12 miles at a cost of $2.76 per mile, what is the total cost?

Back

$33.12.

Front

What is the sum of 23.8 and 24.75?

Back

48.55.