Operations with Decimals

Front

What is a decimal?

Back

A decimal is a fraction whose denominator is a power of ten, represented with a dot (decimal point) separating the whole number from the fractional part.

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 result of 0.26 x 8.1?

Back

2.106

Front

How do you subtract decimals?

Back

Align the decimal points of the numbers, subtract as you would with whole numbers, and place the decimal point in the answer directly below the other decimal points.

Front

What is the result of -23.99 - 4.50?

Back

-28.49

Front

What is the process 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 and divide as usual.

Front

What is the result of 0.36 ÷ 0.6?

Back

.6

Front

How do you find change from a purchase?

Back

Subtract the total cost from the amount paid to find the change.

Front

If you buy $4.73 worth of food and pay with a $5 bill, how much change do you receive?

Back

.27

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 answer.