Sophia is designing bracelets to sell at a jewelry market. Each bracelet requires 2.25 feet of cord. At the craft store, cord is sold by the yard. If Sophia wants to make 96 bracelets, how many yards of cord must she buy?
2.25 × 96 = 216 feet --> 72 yards. Sophia must buy 72 yards of cord.
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15
A factory produces 0.036 kilograms of candy in one minute. How many kilograms of candy does the factory produce in 1,000 minutes?
The factory produces 36 kilograms of candy in 1,000 minutes.
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baam
Lose 25 points!
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rocket
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rocket
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thief
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25
seesaw
Swap points!
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magnet
Take 20 points!
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rocket
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thief
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15
A bottle contains 4.275 liters of water. How much water is in 10 bottles?
There is 42.75 liters of water in 10 bottles.
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15
Solve. Show your work: 31.2 × 25
7800 tenths --> 780.0 --> 780
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15
414.21 × 31
1,284,051 hundredths --> 12,840.51
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15
PEMDAS: Solve, "Multiply the difference between 5,900 and 5,000 by 6."
5400
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thief
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seesaw
Swap points!
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rocket
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lifesaver
Give 10 points!
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15
Question: A scientist measures the mass of a particle as 0.00042 grams. What is the mass of 10,000 of the same kind of particle?
The mass of 10,000 particles is 4.2 grams.
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15
Without calculating, compare the two expressions using <, >, or =: 17 × 10 ______ 20 tens − 3 tens.
17 tens = 17 tens
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15
You are multiplying 197 x 750. You got an answer of 147,750. Is it reasonable? Why or why not?
It's reasonable! You can round the factors to 200 x 800, but both factors rounded up, so your answer should be a bit less than 160,000.
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trap
No points!
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star
Double points!
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rocket
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thief
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15
Reason about place value to solve. If 439 x 76 = 33,364, then what is 439 x 7.6?
We are working with tenths, so: 33364 tenths, or 3,336.4. (Or, think: ten times smaller--move the decimal left one place value to shift digits ÷10.)
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15
PEMDAS: Write a numerical expression for the words, "Multiply the difference between 5,900 and 5,000 by 6."
(5,900 - 5,000) x 6
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15
Estimate the product of 9,852 x 126.
≈ 10,000 x 100 = 1,000,000 OR 10,000 x 120 = 1,200,000.
