Defenitions & Facts
How many factors do prime numbers have?
ALL prime numbers have ONLY 2 factors, 1 & itself
Is the number 10 prime or composite?
Composite! Divisible by 2 and 5
Determine the prime factorization of 12
Step two: 12 = 2 x 2 x 3
Simplify the following expression: 2 x (7 - 3) ÷ 8 + 12
13
True or False: Composite numbers can be even or odd, as long as they have only 2 factors
FALSE: Composite numbers CAN be even or odd, HOWEVER they must have 3 or more factors
Is 23 prime or composite
Prime!
Not divisible by 2, 3, 5, or 7
Determine the prime factorization of 24
Step 2: 24 = 2 x 2 x 2 x 3
Evaluate the following expression:
(13 + 7) ÷ (24 - 19) x 3
12
What are the steps for Order of Operations?
1. Parentheses
2. Multiply/Divide
3. Add Subtract
Determine what numbers are prime in the following set of numbers: 12, 13, 97, 22, 31
Composite! Divisible by 3
Determine the prime factorization of 31
What operation is completed 3rd for the expression:
26 ÷ 13 - 2 + (3 x 2)
Subtraction
What is a prime factorization?
A number sentence made of ONLY the prime factors of a number
Is 91 prime or composite?
Composite! Divisible by 7
Determine the prime factorization of 32
What does the expression look like after the 3rd step?
35 - 7 x 2 + (14 - 4)
21 + (10)
What are the 4 prime numbers that make up the most common factors of composite numbers
2, 3, 5, 7
Is 1 prime or composite?
Neither!
Determine the prime factorization of 98
Step two: 98 = 2 x 7 x 7
Look at a student solving an expression; what mistake did they make?
Step One: 3 + 5 × (8 – 2 × 3)
Step Two: 3 + 5 × (8 - 6)
Step Three: 3 + 5 × 2
Step Four: 8 × 2
Final Answer: 16
Going from step 3 to step 4, they should have multiplied first instead of adding