Multiply Decimals by Powers of 10
What is 0.5 × 10?
5
A store has a contest to guess the weight of 1,000 black jellybeans on display in its window. If each of the jellybeans weighs 0.072 ounces, what is the total weight of all the jellybeans?
72 ounces
If you multiply 738 by 45, what will be the partial products?
690 and 29,520
Olivia exercises for 45 minutes each day. How many minutes will she exercise during the month of July? (July has 31 days.)
1,395 minutes
16 x 5.3
84.8
What happens to 1.2 when you multiply it by 100?
120
Jason saved $0.02 each day for 10,000 days. How much did he save in all?
$200
Which of the following numbers are prime? Select all that apply. 41 43 45 47 49
41, 43, 47
A group of 106 campers sits in a big circle. The camp leader tells them to say “hello” to each camper sitting to their left and right. What is the total number of times the campers say “hello”?
212 times
Derrick buys 12 roses that cost $2.49 each. How much did Derrick spend in all?
$29.88
0.25 x 1000
250
Jefferson uses a microscope to observe a specimen in biology class. If his microscope enlarges objects 100 times their actual size and the specimen measures 0.009 inches, what is the size seen in the microscope?
0.9 inches
Find the sum. 68.47 + 121.35
189.82
The students put together 12 jigsaw puzzles. Each puzzle had 345 pieces. How many puzzle pieces did they put together in all?
4,140 puzzle pieces
A store sells 14.5-ounce cans of tomatoes for $0.89 each. If the store sells 35 cans one day, how many total ounces of tomatoes are sold? What is the total cost? Show your work.
507.5 ounces; $31.15
0.04 × 10
0.4
Tim planted a tree that was 0.17 feet tall. After 6 years, the tree was 100 times as tall as when he planted it. What is the height of the tree after 6 years? 5.2 inches 72 ounces 0.9 inches $200
17 feet
A playground fills a rectangular lot
It is 62.5 ft long and 100 ft wide.
What is the area of the playground?
6,250 square feet
The students used 35 boxes of graham crackers to make the s’more. Each box had 208 graham crackers. How many graham crackers did the students use?
7,280 graham crackers
8.7 x 24
208.8
9.75 × 103
9,750
Anya needs to buy 100 pounds of chocolate to make her holiday truffles. If chocolate sells for $0.49 per pound, how much will Anya spend?
$49
There are 32 fish tanks in a pet store and no more than 18 fish in each tank. What is the greatest possible number of fish in the store?
576
The students made a tub of lemonade for the fairgoers. They used 46 cases of lemons. Each case held 105 lemons. How many lemons did the students use?
4,830 lemons
The airline that Vince is using has a baggage weight limit of 41 pounds. He has two green bags, each weighing 18.4 pounds, and one blue bag weighing 3.7 pounds. Are his bags within the weight limit?
Write an equation that you can use to help you solve the problem.
18.4 × 2 + 3.7