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Estimating, GCF and LCM Review

Total questions: 21

Worksheet time: 5hrs 15mins

Name
Class
Date
1.
What is the least common multiple (LCM) of 6 and 8?
a)
6
b)
8
c)
48
d)
24
2.
Find the Least Common Multiple of 9 and 6
a)
18
b)
36
c)
38
d)
72
3.

About how much money should Jane bring to the movies if her ticket costs $5.95, popcorn costs $3.85 and a drink costs $1.25?

a)

$11.05

b)

$15

c)

$11

d)

$10.75

4.
Find the Greatest Common Factor (GCF) of 12 & 27
a)
1
b)
3
c)
9
d)
12
5.
What is the GCF of 4 and 12?
a)
3
b)
1
c)
6
d)
4
6.

Starting on Nov. 1, if Roza runs every third day and swims every fifth day, what is the first day that she will both run and swim again?

a)

5

b)

16

c)

22

d)

30

7.
Which is a factor of 15?
a)
2
b)
3
c)
4
d)
6
8.
Which is a NOT a factor of 9?
a)
0
b)
1
c)
3
d)
9
9.
Estimate:
62 X 3=
a)
180
b)
210
c)
150
d)
240
10.

There are 150 students going on a field trip. Permission slips have been brought in 94 students. About how many permission slips still need to be turned in?

a)

50

b)

60

c)

244

d)

100

11.
Estimate:
27 x 12
a)
30
b)
200
c)
20
d)
300
12.

One pound of bananas cost $0.95. About how much is 5 pound of banana cost?

a)

$5.00

b)

$50.00

c)

$0.50

d)

$0.95

13.

Find the Greatest Common Factor (GCF) OF 18 & 36

a)

1

b)

3

c)

6

d)

9

14.

Bill has 623 baseball cards and 489 football cards. About how many cards does Bill have altogether?

a)

1,121

b)

134

c)

1,100

d)

100

15.

Round to the nearest thousand and solve:

24,936 + 15,294

a)

39,000

b)

40,000

c)

40,230

d)

39, 230

16.
What is the least common multiple (LCM) of 4 and 10?
a)
4
b)
40
c)
15
d)
20
17.

Omar has 5,233 books. Mykelle has 2,354 books. Estimate how many fewer books Mykelle has?

a)

2,900.

b)

3,000.

c)

2,879.

d)

2,870.

18.
Estimate to the hundreds place.
387 + 410 + 405 = 
a)
12
b)
1,300
c)
1,000
d)
1,200
19.

Mrs. Hajek used 1,820 pencils last year. This year she thinks she will use 1,932 pencils. About how many pencils is that all together to the nearest hundred?

a)

3,000.

b)

3,700.

c)

4,000.

d)

3,752.

20.
70 x 80 =
a)
560
b)
420
c)
5600
d)
4200
21.

The distance between Emery's house and his aunt's house is 485 miles. ABOUT how many miles would he drive if he made 4 trips to his aunt's house AND BACK?

a)

5,000

b)

4,000

c)

3,200

d)

2,000