# Glencoe Mathematics Five Minute Check Main Idea Example

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```					Five-Minute Check
Main Idea
Example 1: Use the Four-Step Plan
Key Concept: Problem-Solving Strategies
Example 2: Use a Strategy in the Four-Step Plan
• Solve problems using the four-step plan.
Use the Four-Step Plan

SPENDING A can of soda holds 12 fluid ounces. A
2-liter bottle holds about 67 fluid ounces. If a pack of
six cans costs the same as a 2-liter bottle, which is
Understand What are you trying to find?
You are trying to find the number of fluid
ounces of soda in a pack of six cans. This
number can then be compared to the number
of fluid ounces in a 2-liter bottle to determine
What information do you need to solve the
problem?
You need to know the number of fluid ounces
in each can of soda.
Use the Four-Step Plan

Plan      You can find the number of fluid ounces of
soda in a pack of six cans by multiplying the
number of fluid ounces in one can by six.
Solve     12 × 6 = 72
There are 72 fluid ounces of soda in a pack
of six cans. The number of fluid ounces of
soda in a 2-liter bottle is about 67. Therefore,
the pack of six cans is the better buy
because you get more soda for the same
price.

Use the Four-Step Plan

The answer makes sense based on the facts
given in the problem.
School is taking a field trip to the local zoo. There will
be 142 students plus 12 adults going on the trip. If
each school bus can hold 48 people, how many
buses will be needed for the field trip?

A. 3 buses
B. 4 buses
C. 5 buses                                       1.
2.
A
B
3.   C
D. 6 buses                                       4.   D

0%   0%   0%   0%
A

B

C

D
Use a Strategy in the Four-Step Plan

POPULATION For every 100,000 people in the
United States, there are 5,750 radios. For every
Suppose Sheamus lives in Des Moines, Iowa and
Alex lives in Windsor, Ontario. Both cities have
radios are there in Sheamus’s city than in Alex’s
city?
Understand     You know the approximate number of
radios per 100,000 people in both
Sheamus’s city and Alex’s city.
Use a Strategy in the Four-Step Plan

Plan     You can find the approximate number of
radios in each city by multiplying the estimate
per 100,000 people by two to get an estimate
per 200,000 people. Then, subtract to find how
many more radios there are in Des Moines
than in Windsor.
Solve    Des Moines: 5,750  2 = 11,500
Windsor: 323  2 = 646
11,500 – 646 = 10,854
Use a Strategy in the Four-Step Plan

Check   Based on the information given in the problem,
the answer seems to be reasonable.
READING Ben borrows a 500-page book from the
library. On the first day, he reads 24 pages. On the
second day, he reads 39 pages and on the third day
he reads 54 pages. If Ben follows the same pattern
of number of pages read for seven days, will he
have finished the book at the end of the week?
A. No, he will have only
B. No, he will have only                             1.        A
2.        B
4.        D
C. yes                                 0%   0%   0%       0%

A

B

C

D
D. not enough information
given
End of the Lesson
Five-Minute Check

Image Bank

Math Tools

Arithmetic Sequences

Modeling Algebraic Expressions

Function Machines
Find 5,678 – 3,479.

A. 1,299

B. 1,929

C. 2,199                            1.        A
2.        B
3.        C
0%   0%   4.
0%   D
0%
D. 2,919
A

B

C

D
Find 29,811 ÷ 57.

A. 523

B. 513

C. 503                            1.        A
2.        B
3.        C
0%   0%   4.
0%   D
0%

D. 493
A

B

C

D
Each classroom in a school has 30 student desks.
If the average class size is 25 students, and there
are 55 classrooms occupied by classes, about how
many unused desks are there?

A. 300

B. 275
1.   A
2.   B
3.   C
C. 250                                        4.   D
0%   0%   0%   0%

D. 225
A

B

C

D
Katrina’s family wants to order
Chinese food for dinner. Using the
table, write and solve an equation
to find how much money Katrina’s
family needs to pay for their order.

A.   8(\$2.95 + \$4.95 + \$5.95 + \$1.89) = x;
x = \$125.92
B.   2(\$2.95 + \$4.95 + \$5.95 + \$1.89) = x;            1.    A
x = \$28.42                                       2.    B

C.   (2 × \$2.95) + \$4.95 + (2 × \$5.95) +              3.    C
4.    D
(3 × \$1.89) = x; x = \$28.42                 0%   0%   0%   0%

D.   \$2.95 + \$4.95 + \$5.95 + \$1.89 = x;

A

B

C

D
x = \$15.74
Katrina’s family wants to order
Chinese food for dinner. How much
change should Katrina’s father
receive if he pays for the Chinese
food with a fifty-dollar bill?

A.   \$21.58

B.   \$21.82                                     1.   A
2.   B
3.   C
C.   \$25.18                                     4.   D

0%   0%   0%   0%
D.   \$28.42
A

B

C

D
A. 55%

B. 65%

1.        A
C. 75%                 2.        B
3.        C
0%   0%   4.
0%   D
0%

D. 85%
A

B

C

D

```
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