Multiplying Decimals Test Review

Multiplying Decimals Test Review

Topic 4A

Multiplying a decimal by a power of 10

Remember to move the decimal point (to the RIGHT!) the same amount of times as the number of 0's in the power of 10.

Shel'Kyra is in charge of buying the steaks for her class's annual picnic. She needs to buy enough steak for 1,000 servings. Each serving will weigh 0.75 pound. How many pounds of steak does Shel'Kyra need to buy?

Multiple Choice

0.125 x 1000

• 1.25

• .0125

• 12.5

• 125

​Remember: When multiplying decimals...

​1. Ignore the decimal

​2. Line up numbers like normal (starting in the ones place)

​3. Multiply like normal

​4. Count how many decimal place values there were in the original problem.

​5. Move the decimal that many times to the left in your answer!

​Kiara is making a shelf to store her collection of books. She is using 3 pieces of wood that are each 2.38 feet long. How much wood will Rhianna use to make the shelf?

Fill in the Blanks

$3.21\ \times\ 20$  

​Remember: When adding decimals...

​1. Line up the decimals! (SHIRT AND PANTS)

​2. Add like normal!

​Jabron, Josh, and Nate went to the moves. Jabron spent $14.21 at the fair. Josh spent $1.54 more than Jabron. Nate spent 2 times as much money as Josh spent. How much did Nate spend at the movies?

​KaNiya studies math every night. She studied 11 hours this week. Last week, she studied 1.5 times as many hours as she studied this week. How many hours did KaNiya study last week?

Fill in the Blanks

3.7 x 12

​In high school, Ms. Cognevich was paid $7.15 an hour. She worked 5 hours a day. If she worked Monday through Friday, how much did she earn?

Multiple Choice

Detemine the value of the following expression:  $$10.1+8.32+7.25=$$  

• 25.67

• 2.567

• .2567

• 2567

Fill in the Blanks

During a race, 14 people ran 6.3 miles each. How many miles did they run all together?

​The price of admission to the Zoo is $9.50 for each senior citizen, $12.75 for each adult, and $5.25 for each child. A family of 2 adults and 3 children plan to spend the day at the Aquarium. What is the cost for the 2 adults to go?

Remember: when subtracting from zeros...

Multiple Choice

$$30\ -\ 12.57=$$  

• 18.43

• 18.53

• 17.43