Factors & Multiples
How do you find multiples?
Skip counting!
Mr. Jenkins is making an ice rink in his back yard. The length of the rink will be 40 feet and the width of the rink will be 23 feet. How many total feet of boards does he need to make the border of the rink?
126 feet
What is a prime number?
A number who has exactly 2 factors, 1 and the number itself
8 x 9 =
72
24 / 3
8
What is a factor?
A smaller number that is multiplied to find a product
Sarah is ordering hats at her new job for all the employees. She is ordering 72 boxes of hats. Each box contains 12 hats. How many hats did Sarah order?
864 hats
What is a composite number?
a number that has 3 or more factors
15 x 10 =
150
52 / 2
26
List the first 10 multiples of 7
7, 14, 21, 28, 35, 42, 49, 56, 63, 70
Jenny has $387 that she wants to donate to a few different charities. If there are 5 charities she wants to donate to, how many dollars will she be able to give to each charity?
$96
is 1 prime?
NO! It is not prime nor composite
50 x 1,000 =
50,000
72 / 3
24
1, 3, 5, 15
The cafeteria has tables that can fit 8 students at each table. If there are 193 students in the 3rd grade, how many tables does the cafeteria need to have?
35 Tables
is 27 prime or composite?
composite!
23 x 8 =
184
139 / 5
27 R 4
Find all the factors of the number 64
1, 2, 4, 8, 16, 32, 64
Mrs. Young loves frogs. She has 2,938 frogs in her classroom. She wants to give them away and share them equally with 7 friends. How many frogs will Mrs. Young be able to keep for herself after splitting them between her 7 friends?
5 frogs!
is 9,287,176 prime or composite?
Composite!
57 x 89 =
5,073
5,289 / 6
881 R 3