Decimal Operations

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 that represents 5/10.

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 result of 5.86 - 0.2?

Back

5.66

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 result of 123.45 + 56.8?

Back

180.25

Front

What is multiplication of 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 2.3 x 2.5?

Back

5.75

Front

What operation would you use to find out how much money Anna spent if she started with $1,345 and has $567.89 left?

Back

Subtraction

Front

What is the result of 45.6 x 2.2?

Back

100.32

Front

What is division of 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 whole numbers.