Deck 7: Multiplication of Common Fractions

Question 1

To multiply a fraction by a mixed number, first change the mixed number to a(n) ____________________ fraction.

Answer 1

improper

Question 2

How many pounds of grease are there in a barrel that holds 25 gallons? (Use 7 7/8 pounds per gallon.)

A) 184 1/2
B) 190 5/6
C) 192 3/4
D) 196 7/8

Answer 2

196 7/8

Question 3

A channel iron crossmember weighs 3 1/4 pounds per foot. What is the weight in pounds of three crossmembers, each 1 1/2 feet long?

A) 13 1/8
B) 14 5/8
C) 15 1/4
D) 16 1/2

Answer 3

14 5/8

Question 4

A certain car requires 18 3/8 inches of 13/32-inch air-conditioning hose. How many inches of hose are needed for five cars?

A) 79 3/4
B) 86 7/8
C) 91 7/8
D) 93 2/5

Question 5

A car averages 15 1/2 miles to a gallon of gasoline. How many miles can be traveled on 40 gallons?

A) 620
B) 630
C) 635
D) 650

Question 6

A mechanic cuts 15 bushings from a piece of stock. Each bushing is 3/8 inch long. Not allowing for saw cuts, what is the total length used in inches?

A) 5
B) 5 5/8
C) 6
D) 6 1/2

Question 7

9/16 x 8/5 = ____________________/10.

Question 8

Each power steering unit needs 10 1/4 inches of power steering return hose. How many inches of hose are needed to replace the hose in seven units?

A) 65 1/2
B) 67 5/8
C) 71 3/4
D) 76

Question 9

The multiplication process can be simplified by ____________________. Before multiplying, divide the numerator and the denominator by a number that is common to both.

Question 10

A certain car averages 23 2/5 miles per gallon of gas. How far will it travel on 19 3/7 gallons of gas?

A) 430 1/5
B) 440 17/35
C) 448 5/7
D) 454 22/35