CHAPTER 8
Practice 8-1
Practice 8-2
526
Multiply. Use the GCF whenever possible.
1a.^34 ^56 170 b. 190 of 80
2a. 3 ^45 1 ^78 2 ^12 b. 5 ^78 3 ^14
Complete. Name the property of multiplication used.
3a.^37 n 0 b.^78 190 n^78
4a. 191 1 n
6 b.(^12 ^13 ) ^58 ^12 (n^58 )
Write the reciprocal of each number.
5a.^34 b. 8 c. 2 ^13
Divide.
6a. 10 ^23 1 ^19 b. 4 ^17 2 c.$10 3 ^13
7a. 7 ^14 b. 21 ^78 c.^34 6
Compute. Use the order of operations rules.
1a. 6 ^34 ^12 b.^23 ^13 (9 6)
2a. 9 ^23 172 b.^34 ^56 (2 8)
Use a coin and the spinner for problems 3–4.
3.Make a tree diagram to
list all possible outcomes.
4.Find the probability.
a. P(heads, 6)
b.P(tails, 5)
Use a number cube labeled 1–6 to find the
probability of each event.
5a.P(1 or 3) b.P(7) c.P(1 through 6)
6.A 7^12 -ft board is cut into pieces that are ^56 ft
long. How many pieces can be cut?
7.The price of cashew nuts is $9.75 for 1^12 lb.
What is the price of 1 lb?
Evaluate each expression.
8a. 4 ^78 t, when t^45 b.n 1 ^23 , when n 5 ^12
Solve for n.
9a.n 190 3 b. 6 n 22
10.Jason has saved $80. He spent ^34 of it on a
12.new camera. How much did the camera cost?
11.A sofa was on sale for ^13 off the regular price
of $360. Find the sale price of the sofa.
12.Lia bought ^34 yd of felt. She used ^56 of it to
make a banner. How much of the felt did she
use for the banner?
13.Which has the greater product: 3^12 ^13 or
- 6 ^14 ^45 ?
8.Bill has 9^13 c of blueberries. He is using half of
them to make blueberry tarts. If each tart will
have ^23 c of blueberries, how many tarts can
Bill make?
9.In a survey of 36 sixth graders, 16 have braces.
Predict how many wear braces among the
school district’s 720 sixth graders.
10.A card is chosen from a bag containing cards
labeled A, B, C, D, E.Then a second card is
chosen. If the first card is not replaced, find
P(B, D) and P(A, Cor E).
A jar contains 2 red marbles, 4 green marbles,
and 4 white marbles. One marble is drawn at
random. Find the probability.
11a. P(green) b.P(red) c.P(blue)
12a. P(red or white) b.P(notblue)
13.If 6 people want to be seated, in how many
ways can 4 of them be seated on a bench
that seats 4?
14.From 3 girls and 2 boys, how many teams
of 3 can be formed?
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