Prime and Composite
Is the number 35 prime or composite?
Composite
John is 9 years old. His cousin is 3 times older than John. How old is John's cousin?
27 years old
6 x __ = 48
8
Write an equation to represent this problem:
Sam picked 8 apples from the tree. That is 4 times as many as her friend Jill picked. How many apples did Jill pick?
8 = 4x
List all the factors of 24.
1, 2, 3, 4, 6, 8, 12, 24
Is the number 11 prime or composite?
Prime
Jim bought a book and a movie. The movie cost $21.00 and the book cost $3.00. How many times more than the book did the movie cost?
7 times more
9 x __ = 63
7
The equation 8 x 5=40 can mean:
A. 8 apples and 5 apples together are 40
B. 8 pencils divided into 5 groups is 40
C. 40 spiders are 8 times more than the 5 spiders at the black table
C: 40 spiders are 8 times more than the 5 spiders at the black table
List 3 multiples of 18.
18, 36, 65, 72, 90, 108, etc.
Is the number 79 prime or composite?
Prime
Jonathan bought a pair of shoes and a backpack. The shoes cost 3 times as much as the backpack. The backpack was $18. How much did the shoes cost?
$54
12 x __ = 48
4
Write an equation to represent this problem:
Tate has 20 sports cards. That is 4 times as many as his friend Hunter. How many cards does Hunter have?
4 x c = 20
20/c = 4
List all of the factors of 15.
1, 3, 5, 15
Composite
Kelly bought a toy car and a video game. The video game costs $48.00. The toy car cost $6.00. How many more times than the toy car did the video game cost?
8 times more
13 x 3 = __
39
The equation 4 x 7 = 28 can mean?
28 pencils are 7 times more than the 4 erasers on the table.
List 3 multiples of 21.
How do you know that 24 is a composite number?
There is more than one factor pair.
Each of the 3 students at the blue table have 6 markers. The class has 5 times as many markers as the blue table. How many markers total does the whole class have?
90 Markers
14 x 4 = __
56
What 2 equations best represents this situation:
Alyssa has 12 bottles of nail polish. That is 3 times as many as her friend Mel. How many bottles of nail polish does Mel have?
1. 12=3 x n 2. 12x3=n 3. 12-3=n 4. 12/n=3
12 = 3 x n
12/n = 3
List all of the factors of 30.
1, 2, 3, 5, 6, 10, 15, 30