Topics 7 & 8
Review For CFA
Unit 4
The dentist ordered 10 boxes of
toothbrushes. There are 15
toothbrushes in each box.
How many toothbrushes did the
dentist order?
150 toothbrushes
Mark walks 30 minutes every
day. How many minutes does
he walk in a month that has 31
days?
930 minutes
Every day, 60 people eat at Franco’s
Diner.
How many people eat there in 30 days?
1,800 people
Each of the 90 fourth-grade
students at William Street
School
read 30 books over the school
year. How many books did they
read all together?
2,700 books
One centimeter is equal to
10 millimeters. If a photo is
10 centimeters long, how many
millimeters long is the photo?
100 millimeters
Meg saves $38 each week from
the money she earns working
part
time. What is the best estimate
of how much Meg will save in
52 weeks?
52 X $40 = $2,080
It took Anne 18 hours to drive
from her home to Miami. She
drove about 62 miles each hour.
Which shows the best way to
estimate the distance from
Anne’s
home to Miami?
60 X 18 = 1,080 miles
Carl volunteers about 32 hours
each month at the local hospital.
What is the best estimate of
how
many hours he volunteers in
12 months?
30 X 12 = 360 hours
Andy is stacking 49 boxes of
paper on the shelves of an
office
supply store. Each box weighs
about 28 pounds. What is the
best estimate of the total weight
of the boxes?
49 * 30 = 1.470 pounds
A park ranger takes 24 groups
of
people hiking each week. There
are 32 people in each group.
What
is the best estimate of how
many
people hike with the park ranger
24 * 30
= 720
people
each
week?
Fourteen students in Ms.
Engel’s
class have 2 pets. Three
students
have 1 pet. There are 3
students
that do not have any pets. How
many pets does the class have
all
14 * 2 = 28
28
together?
3*1=3
+ 3
31 pets
Destiny is setting up chairs for a
concert. One section will have
5 equal rows of 5 chairs each.
The
other section will have 8 equal
rows of 2 chairs each. How many
chairs will there be in all?
5 * 5 = 25
25
8 * 2 = 16
+ 16
4 1 chairs
Each of the 27 students in
Mrs. Madison’s class brought in
18 aluminum cans during the
class recycling drive. How many
aluminum cans did Mrs.
Madison’s
class collect in all?
486 cans
There are 27 students in Mrs.
Brunner’s class. Each student
does
15 math homework problems
each
night. How many math problems
in all does the class do in one
night?
405 math problems
MacKenzie multiplies 13 × 45.
Which of the following is NOT a
partial product?
A 15
B 50
C 90
D 400
One table in the school cafeteria
can seat 12 students. How
many
students can be seated at 18
tables?
216 students
Genna drinks 74 ounces of
water
a day. How much water does
she
drink over 40 days?
2,960 ounces of water
17 students each brought in 20
cookies for the school bake
sale.
How many cookies were there
at
the bake sale?
340 cookies
Mrs. Witt can type 58 words a
minute. How many words can
she
type in one hour?
58 * 60 = 3,480 words
Jacob reads 68 pages each
night.
How many pages does Jacob
read
in a month with 31 days?
68 X 31 = 2,108 pages
Find the product.
76
× 18
1,368
Which partial products can be
used
to find the product shown
below?
51
× 42
A 2 and 2,000
B 10 and 2,400
C 12 and 2,040
D 102 and 2,040