Multiply and divide 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 5/10.

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 (the number you are dividing by) to the right until it is a whole number. Move the decimal point in the dividend (the number being divided) the same number of places to the right, then divide as usual.

Front

Calculate: 16.24 ÷ 0.14

Back

116

Front

Calculate: 7.13 x 5.5

Back

39.215

Front

Calculate: 0.2 x 0.8

Back

0.16

Front

If gas costs $2.35 a gallon, and it takes 16.3 gallons to fill up my tank, how much will a tank of gas cost?

Back

$38.31

Front

Calculate: 45.1 x 7

Back

315.7

Front

What is the importance of decimal places in multiplication?

Back

Decimal places determine the precision of the result. The more decimal places, the more accurate the result.

Front

What is the difference between multiplying and dividing decimals?

Back

Multiplying decimals increases the value, while dividing decimals decreases the value.