Multiplying and Dividing Decimals

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 1/2.

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 numbers 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. Move the decimal point in the dividend the same number of places. Then, divide as usual.

Front

What is the value of 0.3 x 0.4?

Back

0.3 x 0.4 = 0.12.

Front

What is 25.2 ÷ 4?

Back

25.2 ÷ 4 = 6.3.

Front

If Taylor divides 1.2 pounds of salad into 4 containers, how much is in each?

Back

1.2 ÷ 4 = 0.3 pounds.

Front

How do you find the total cost of multiple items?

Back

Multiply the cost of one item by the number of items. For example, if one bag of candy costs $3.49 and you buy 7 bags, the total cost is 3.49 x 7.

Front

What is 7 bags of candy at $3.49 each?

Back

7 x 3.49 = $24.43.

Front

How do you calculate the total distance traveled?

Back

Multiply the distance of one lap by the number of laps. For example, if the trail is 8.54 miles long and you ride it 4.5 times, the total distance is 8.54 x 4.5.

Front

What is the total distance if Jackie rode around the park 4.5 times?

Back

8.54 x 4.5 = 38.43 miles.