Prime and Composite
Is 5 prime or composite? How do you know?
Prime, because the only factors of 5 are 1 and 5.
List the first 5 multiples of 5.
5,10,15,20,25
Write an equation to match the following statement:
35 pencils are 7 times as many as the 5 pencils at the green table.
5x7=35
Fill in the missing dimension.
Area: 36
Side Length: 9
Missing dimension: 4
3x7=
21
Is 12 prime or composite? How do you know?
Composite, because there are multiple factors that can make up 12.
List the first 5 multiples of 12.
12,24,36,48,60
Write and solve a multiplication equation for the following problem:
Eric is 11 years old. Eric's dad is 3 times older than Eric. How old is Eric's dad?
3x11=33
Eric's dad is 33 years old.
Fill in the missing dimension.
Area: 42
Side Length: 7
Missing dimension: 6
4x20=
80
Is 7 prime or composite? How do you know?
Prime, because the only factors of 7 are 1 and 7.
List all of the factors of 5.
1,5
Write and solve a multiplication equation for the following problem:
Amber bought a pair of pants and a pair of shoes. The shoes cost 3 times as much as the pants. The pants cost $15. How much did the shoes cost?
3x15=45
The shoes cost $45.
Complete the ratio table:
1 6
2 __
4 24
5 __
__ 60
11 __
1 6
2 12
4 24
5 30
10 60
11 66
__x22=220
10
Is 18 prime or composite? How do you know?
Composite, because there are multiple factors for 18. The factors are 1,2,3,6,9,18.
List all of the factors of 12.
1,2,3,4,6,12
Write TWO equations that represents the following story problem:
Marcus has 15 toy cars. That is 3 times as many as his brother Craig has. How many toy cars does Craig have? (c stands for Craig's toy cars)
3xc=15
15÷c=3
50x__=400
4
Is 34 prime or composite? How do you know?
Composite because it has multiple factors. The factors of 34 are 1,2,17,34.
List the first five multiples of 18.
18, 36, 54, 72, 90
Write and solve and equation for the following story problem:
Abby saw 3 rows of crayons in her 24-count crayon box. How many crayons are in each row?
24÷3=8
There are 8 crayons in each row.
7x8=
56