Factors & Multiples
List the factors of 10.
2, 5, 10, 1
Is 7 prime or composite?
Prime
True or false.
8 times as many as 4 is 32.
True
What do all of the numbers below have in common? Choose all the correct answers.
4, 8, 12, 16, 20
a. They are factors of 4
b. They have 4 as a factor
c. They are multiples of 4
d. They are multiples of 12
b. & c.
True or false.
24 is a multiple of 8.
True
Why is 21 a composite number?
21 has more than one factor pair. (21 and 1, 7 and 3)
Which equation represents the bar model on the board?
a. 3 + 5 = 15
b. 5 - 3 = 2
c. 5 x 3 = 15
d. 15 x 3 = 5
c.
Lucas L. has 7 toy trucks. Lucas C. has 4 times as many toy trucks as Lucas L. Draw and label a bar model to show the number of toy trucks each boy has.
4 boxes of 7
List the first four multiples of 6.
6, 12, 18, 24
Is 25 prime or composite? Write the factors.
Composite. (5, 25, 1)
True or false.
This word problem correctly matches the equation 6 x 3 = 18.
Mya has 6 notebooks. Avery has 3 more notebooks than Mya. How many notebooks does Avery have?
False
Last week Billy played football for 8 hours. This week he played football for 3 times as many hours as he did last week. What is the total number of hours Billy played football over the two weeks?
32 hours
List the first five multiples for the numbers below.
3
4
7
4, 8, 12, 16, 20
7, 14, 21, 28, 35
Tell whether the numbers listed below are prime or composite.
49
8
19
2
49 - composite
8 - composite
19 - prime
2 - prime
Write two comparisons to describe the equation 7 x 8 = 56.
56 is 7 times as many as 8.
56 is 8 times as many as 7.
Last year it snowed 40 inches in January. This year it snowed 5 inches in January. Write and solve an equation to find how many times as much snow fell last year than this year.
40 divided by 5 = 8
Max has 40 pencils and puts them into bags. Which list shows all of the possible numbers of pencils Max can put into each bag?
1. 1, 4, 10, 2
2. 1, 40, 8, 5, 2, 20, 4, 10
3. 8, 5, 20, 2, 4, 10
4. 4, 10
2. 1, 40, 8, 5, 2, 20, 4, 10
True or false. (Write ALL the factor pairs for each)
1. 40 is a prime number
2. 22 is a prime number
3. 30 is a composite number
1. False (2 and 20, 4 and 10, 5 and 8, 40 and 1)
2. False (2 and 11, 22 and 1)
3. True (5 and 6, 3 and 10, 30 and 1)
Which comparisons describe the equation 6 x 7 = 42? Choose all the correct answers.
a. 42 times as many as 7 is 6.
b. 6 times as many as 7 is 42.
c. 42 is 7 times as many as 6.
d. 42 is 6 times as many as 7.
b., c., d.
Ms. Beach arranges the desks in the classroom into 3 rows of 8. What are two other ways Ms. Beach could arrange the desks?
Possible answers:
8 rows of 3
4 rows of 6
2 rows of 12