Prime/Composite
Is 17 prime of composite?
Prime
I have 3 quarters and you have 5 times as many. How many quarters do you have?
15
What are the factors of 13?
1, 13
Write an equation and an answer: There are 3 students in the orange group. They each brought 4 packs of paper. How much paper do they have?
3 x 4 = 12
20 x 2
40
Is 21 prime or composite?
Composite
Charlie has 7 toy cars. His brother has 3 times as many. How many toy cars does his brother have?
21
What are the first two multiples of 6?
6, 12
7 x 10 = 70
7 x 7
49
What does prime mean?
A number that only has 2 factors
Makayla is 11 years old. Her grandma is five times as old as her. How old is her grandma?
55
What are the factors of 24?
1, 2, 3, 4, 6, 8, 12, 24
Write an equation with an answer: If there are 40 ducks and half of them fly away, how many ducks are left?
40 ÷ 2 = 20
6 x ___ = 36
6
What does composite mean?
A number that has more than 2 factors
A truck is 5 feet tall. A tree is 4 times as tall. What equation can be used to find the height of the tree?
5 x 4 = 20
What are factors?
The numbers you multiply together to get a given number
Write an equation with an answer for 48 crayons are 6 times the 8 crayons at the green table
6 x 8 = 48
__ x 9 = 36
4
Name one number that is not composite or prime (there are two)
0 and 1
There were 10 green ducks. Twice as many blue ducks flew in. How many ducks are there in all?
30
What are multiples?
The answers when you multiply a given number by other numbers
Write an equation with an answer: A total of 20 players will play basketball. There will be exactly 5 players on each team. How many teams can they make?
20 ÷ 5 = 4 teams
25 x ___ = 100
4