Divisibility
If the sum of the digits is a multiple of three.
What is divisible by 3?
0, 10, 20, 30, 40, 50, 60
What are the first 6 multiples of 10.
A diagram used to find prime factorization.
What is a factor tree?
Any number multiplied by 0 is zero.
What is the zero property?
Length x width
What is area?
The last two digits can be divided evenly by 4.
What is divisible by 4?
1, 2, 3, 5, 6, 10, 15, 30
What are the factors of 30?
2 x 2 x 3 x 5
What is the prime factorization of 60?
Switching the order of the factors does not change the product.
What is the commutative property?
Length + width + length + width
What is perimeter?
For a number to be divisible by 9
What is, the sum of the digits must be a multiple of 9.
What are 15, 30?
2 x 2 x 2 x 2 x 2 x 5
What is the prime factorization of 160?
Show the associative property using the letters m, n, o.
I want to cover a 10in x 12in piece of paper with inch tiles. I need to figure out how many inch tiles I need.
What is 120 inch tiles?
I am wondering if I can evenly share 136 candy bars evenly with 6 people.
What is no - it is not divisible by 6.
True or False: Prime numbers only have 2 factors.
What is true?
2 x 4 x 7 = 56
What is 4 is not a prime number?
(15 x 23) = (m x 20) + (m x 3)
A square playroom has a length of 16 feet. I need to know how many square feet of rug I need to fully carpet the room.
What is 256 square feet?
Third grade classrooms have table groups of 2, fourth grade classrooms have table groups of 3, fifth grade classrooms have table groups of 5, and sixth grade classrooms have table groups of 6. Ms. Kestler has 990 pencils. Will she be able to fairly distribute these to all grades?
Yes because 990 is divisible by 2, 3, 5, and 6.
List all the factors of 425.
1, 5, 17, 25, 85, 425
Find the prime factorization of 13,268.
2 x 2 x 31 x 107 = 13,268
Evaluate using the distributive property.
231 x 33
231 (10 + 10 + 10 + 3)
(231 x 10) + (231 x 10) + (231 x 10) + (231 x 3)
(2310 + 2310 + 2310 + 693)
7,623
My grandmother is making me a rectangular quilt for my bed. The quilt is 20 inches by 30 inches. She is using square pictures to decorate the quilt. Each picture has a length of 10 inches. How many pictures can she fit on the quilt?
What is 6 pictures?