Decimal Operations

Decimal Operations

Here are some helpful steps to remember when it comes to adding, subtracting, multiplying and dividing decimals! Click on each interactive element to discover more.

Multiplying

Adding

Subtracting

Dividing

1. Do NOT line up decimals2. Ignore the decimals and multiply as usual 3. Count the places after the decimal in each factor, and then move that many spaces in final product to place new decimal

1. Move decimals from divisor and dividend2. Drag decimal on top after you've moved decimal 3. Divide like normal

1. When subtracting decimals, you MUST line up your decimals. 2. Put the larger number on top and fill in any empty spots with zeros

1. When adding decimals, you MUST line up your decimals. 2. Fill in any empty spots with place value holders (zeros)

+ Watch this video for more help

Watch this video for more help

Are you ready to test your skills

START

QUIZ Decimal Operations

What is the product of 4.5 x 2.004?

9.018

0.9018

90.18

QUIZ Decimal Operations

10.72 divided by 0.4

268.0

2.68

26.8

QUIZ Decimal Operations

3. Calculate the quotient 33 divided by 2.5

13.2

13.02

16.2

QUIZ Decimal Operations

4. A baby weighed 6.25 lb at birth. At the end of 6 months, the baby weighed 2 1/2 times its birth weight. How many pounds did the baby weigh at the end of 6 months?

37.5 lb

15.625 lb

12.5 lb

QUIZ Decimal Operations

5. Andrew uses 52.5 cups of flour to make oatmeal cookies for a bake sale. If he makes 15 batches of cookies, how many cups of flour does he use for each batch?

787.5

3.5

.35

QUIZ Decimal Operations

6. Convert the fraction 2/5 to a decimal.

.4

2.5

.2