Adding, Subtracting, Multiplying 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 add decimals?

Back

Align the decimal points and add as you would whole numbers, placing the decimal point in the answer directly below the other decimal points.

Front

How do you subtract decimals?

Back

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

Front

How do you multiply decimals?

Back

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 moving the decimal when multiplying?

Back

Count the total number of decimal places in both factors and move the decimal point in the product to the left by that total number of places.

Front

What is the result of 94 - 4.8?

Back

89.2

Front

What is the total snowfall if it snowed 3.56 inches, then 4.359 inches, and finally 3.07 inches?

Back

10.989 inches.

Front

How do you find the total when adding multiple decimals?

Back

Add each decimal value together, ensuring to align the decimal points.

Front

If K.J. needs 2.125 yards of fabric for each costume, how much fabric does she need for 34 costumes?

Back

72.25 yards.

Front

What is 2.39 x 4.37?

Back

10.4443