Factors / Multiples
List the factors of 8
1, 2, 4, 8
What is a prime number?
A prime number is a number that ONLY has 2 factors
Beth has 3 bows. Sarah has 5 times more bows than Beth. How many bows does Sarah have?
15 bows
What is the trick when multiplying by 10.
Anything times 10 , add a 0 to the end.
List 3 multiples of 5
5, 10, 15, 20, 25
What are the two factors of a prime number ALWAYS?
1 and itself
Larry is 32 years old. His daughter is 4 times younger than him. How old is his daughter?
8 years old
Create equal groups to solve this equation
5 x 8
5 groups of 8 OR 8 groups of 5 = 40
Create a factor rainbow for the number 20.
1, 2, 4, 5, 10, 20
What is a composite number? Give an example.
A number that has MORE than two factors.
Brooke is throwing a party with 11 guests. She bought each guest 3 pieces of candy. She then remembered that each guest is brining a friend so she will need 2 times more candy than she thought. How many pieces of candy will she need?
66 pieces of candy
Create an array for this equation
3 x 7
3 rows and 7 columns OR 7 rows and 3 columns = 21
List 3 multiples of the number 11.
11, 22, 33, 44
Is 13 prime or composite? how do you know?
13 is prime because it only has two factors, 1 and 13.
Marcus has 5 kids and each of his kids have 3 pairs of shoes. Henry has 2 kids and each of his kids have 3 pairs of shoes. If they combined the shoes and split them evenly between the kids, how may pairs of shoes would each kid get?
3 pairs of shoes
Create a story problem for
5 x 2 = 10
answers will vary
What number is a factor of 18 and a multiple of 3?
6 or 9
Are all odd numbers prime? Can you give an example?
Nope!
9 is composite
15 is composite
21 is composite
Claire has a box of 36 markers. She sees that there are 4 rows in the box with an even number of markers in each row. How many markers are in each row?
12 markers
Create equal groups AND an array for this equation
8 x 7 = 56
8 groups of 7 OR 7 groups of 8 = 56
7 rows and 8 columns OR 8 rows and 7 columns = 56