Factors
List all of the factor pairs for 12
(1, 12) (2, 6) (3, 4)
What are the first 3 multiples of 5?
5,10, 15
Is 8 prime or composite? How do you know?
Composite, because it is even it has 2 as factor, so it hs more than two factors.
7 x _____ = 49
7
36/9 = ______
( / means divided by)
4, because 9 x 4 = 36
List all of the factor pairs of 18
(1, 18) (2, 9) (3, 6)
List 3 multiples of 12
Example: 24, 36, 48
Is 13 prime or composite? How do you know?
Composite, because its only factors are 1 and 13
Bob bought a shirt and pants. the pants cost 3 times as much as the shirt, the shirt cost $12. How much did the pants cost?
The pants cost $36
24 markers are divided into 4 rows. How many markers per row?
6 markers per row
4 x 6 = 24
List all of the factor pairs for 24
(1, 24) (2, 12) (3, 8) (4, 6)
9, 15, and 24 are all multiples of what number?
Is 15 prime or composite? How do you know?
Composite, it is a multiple of five, so 5 is one of its factors
There are 8 students in the Bears group. They each brought in a pack of 12 pencils. How many pencils in all?
96 pencils
36 cookies divided equally among 9 students.
How many cookies did each student get?
4 cookies per student
List all of the factor pairs for 31
(1, 31)
What are the first three multiples of 16?
16, 32, 48
Is 21 prime or composite? How do you know?
Composite, because 3 x 7=21
True or False
8 x 7 = 56 can mean:
56 students each brought their teacher 8 cookies
False! It can mean 8 students each brought their teacher 7 cookies (he got sick eating 56 cookies!!)
54/9 = ________
6 (9x6=54)
List all of the factor pairs for 36
(1, 36) (2,18) (3, 12) (4, 9) (6)
What is the 5th multiple of 25?
125
Is 37 prime or composite? How do you know?
Prime, because it's only factors are1 and 37
Write an equation for the following story: Jill picked 40 flowers, that's 5 times as many as her brother. How many flowers did her brother pick?
40 = 8 x f f=5 Her brother picked 5 flowers.
Solve:
((4x5)+(5x4))/10=X
X=________
X=4