Add, Subtract, Multiply, & 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 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 process for subtracting decimals?

Back

To subtract decimals, align the numbers by the decimal point, subtract as you would whole numbers, and place the decimal point in the difference directly below the other decimal points.

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 rule 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

Example of adding decimals: 41.73 + 25.25 = ?

Back

66.98

Front

Example of subtracting decimals: 75 - 18.28 - 42.39 - 12.97 = ?

Back

1.36

Front

Example of multiplying decimals: 3.57 x 4.6 = ?

Back

16.422

Front

Example of dividing decimals: 6.4 ÷ 0.8 = ?

Back

8.0

Front

What is the importance of the decimal point in calculations?

Back

The decimal point indicates the value of digits in a number, determining their place value and ensuring accurate calculations.