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WorksheetsTopic 5 Review
Total questions: 10
Worksheet time: 20mins
Name
Class
Date
1.
Which addition sentence shows how to use partial products to find 2 x 28?
a)
40 + 16 = 56
b)
16 + 4 = 20
c)
32 + 2 = 34
d)
40 + 8 = 48
2.
Which will cost less than $4,000?
a)
6 rugs for $900 each
b)
8 rugs for $600 each
c)
7 rugs for $700 each
d)
9 rugs for $400 each
3.
Which of these is the closest estimate for 6 x 68?
a)
6 x 11 = 66
b)
6 x 60 = 360
c)
6 x 80 = 480
d)
6 x 70 = 420
4.
There are 24 hours in a day. Kendra’s new puppy is 8 days old. Which is the best estimate of the number of hours Kendra’s puppy has been alive?
a)
200
b)
400
c)
600
d)
800
5.
Which equation shows the number of squares in the array?
a)
8 x 10 =80
b)
8 + 10 = 18
c)
8 + 100 = 108
d)
8 x 100 =800
6.
Michelle wrote a whole number ending in 4 zeros. If she multiplies the number by 10, how many zeros should be in the product?
a)
1
b)
6
c)
4
d)
5
7.
In a class, 14 students will present their science projects. Each student gets to talk for 5 minutes. How much time is needed to present all of the science projects?
a)
70
b)
80
c)
210
d)
19
8.
In Omar’s school, there are 8 fourth grade classrooms. Each classroom has about 27 students. Which is a reasonable estimate of the number of fourth graders in Omar’s school?
a)
160 because 8 x 27 is about 8 x 20 = 160
b)
180 because 8 x 27 is about 9 x 20 = 180
c)
200 because 8 x 27 is about 8 x 25 = 200
d)
300 because 8 x 27 is about 10 x 30 = 300
9.
Find 78 x 4 by using mental math.
a)
322
b)
320
c)
312
d)
212
10.
A school purchased 8 boxes of chalk. Each box contained 196 pieces of chalk. Which number sentence shows the best way to use rounding to estimate the total number of pieces of chalk?
a)
8 + 100 =108
b)
8 + 200 = 208
c)
8 x 100 = 800
d)
8 x 200 = 1,600
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