Prime factorization
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Estimating
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100
Hong planted 16 tomato plants in his garden. What is the prime factorization of 16?
2 x 2 x 2 x 2
100
A store has the floor plan shown. Estimate the part of the store used for sporting goods. Explain how you decided.
About 1/4 of the store is used for sporting goods. About 4 sporting goods areas would fill the store.
100
Replace each addend with 0, 1/2, or 1. What is the best estimate for the sum of 5/8 + 8/9 ?
1/2 + 1 = 1 1/2
100
Tito ate 3/8 of a pizza. Janet ate 1/4 of the same pizza. Which of the following is not an equivalent fraction for the amount of pizza eaten by Tito and Janet?
a. 10/16
b. 16/24
c. 5/8
d. None of the above
b. 16/24
100
Rename 5/12 and 3/8 using a common denominator.
10/24 and 9/24
100
A green snake is 8/9 yard long. A garter snake is 13/18 yard long. How much longer is the green snake than the garter?
16/18-13/18= 3/18=1/6
200
What is the prime factorization of 45?
3 x 3 x 5
200
Benjamin and his sister shared a large sandwich. Benjamin ate 3/5 of the sandwich and his sister ate 1/7 of the sandwich. What is the best estimate of how much more Benjamin ate than his sister?
1/2 - 0 = 1/2
200
Sandra drove for 1/3 hour to get to the store. Then she drove 1/5 hour to get to the library. What fraction of an hour did Sandra drive in all?
8/15 hour
200
Teri and her friends bought a party-size sandwich that was 7/9 yard long. They ate 2/3 of a yard. What part of a yard was left?
7/9 - 6/9= 1/9
200
Rhys is kayaking down a 4/5 mile stream. He has already traveled 1/4 of a mile. How much farther does he need to travel? Draw a picture and write an equation to solve.
4/5 - 1/4 = 16/20-5/20=11/20
300
The table lists sizes of packages of school supplies. What is the prime factorization of the number of pencils in one package?
2 x 2 x 3
300
Pablo and Jamie bought two pizzas that were the same size. Jamie ate 1/4 of her pizza. Pablo ate 1/3 of his pizza. How much more pizza did Pablo eat than Jamie? How much pizza did they eat in all?
Pablo ate 1/12 more pizza than Jamie.
They ate 7/12 of a pizza in all.
400
Mr. Vail purchased 3 packages of erasers. What is the prime factorization of the total number of erasers Mr. Vail has?
2 x 3 x 5
500
Which of the following are prime numbers? Write the prime factorization for one of the composite numbers.
17, 47, 51, 89
600
Bill and two of his friends divide 45 pens equally. What is the prime factorization of the number of pens each friend has?
45 divide 3 = 15 = 3 times 5