Basic Mathematics for College Students

74 Chapter 1 Whole Numbers

Form To find the number of ounces of water in the 5-gallon bottle, we multiply:

There are 640 ounces of water in the 5-gallon bottle. We then use that answer to

find the number of 6-ounce servings.

divided by

640 6

SolveUse long division to find

The remainder

StateIn a 5-gallon bottle of water, there are 106 6-ounce servings, with 4 ounces

of water left over.

CheckTo check the multiplication, use estimation. To check the division, use the

relationship:(Quotientdivisor)remainderdividend.



106

6  640

 6

4

 0

40

 36

4

640 6.

 

The number

of servings

of water

the number of

ounces in one

serving.

the number of

ounces of water

in the bottle

is

equal

to

The number

of servings

of water

1

1

2

4

8

 5

640

6 ounces

128 ounces

128 ounces

128 ounces

128 ounces

128 ounces

.

.

.

3 Recognize unimportant information in application problems.

EXAMPLE (^6) Public Transportation Forty-seven people were riding
on a bus on Route 66. It arrived at the 7th Street stop at 5:30 PM, where 11 people
paid the $1.50 fare to board after 16 riders had exited. As the driver pulled away
from the stop at 5:32 PM, how many riders were on the bus?
AnalyzeIf we are to find the number of riders on the bus, then the route, the stop,
the times, and the fare are not important. It is helpful to cross out that information.