Prime/Composite
Prime or Composite? How do you know?
7
Prime
Only factors are 1 x 7
True or False
Prime Factorization of 8
2 x 2 x 2
True 2 x 2 x 2 =8
7 + 8 x 3
31
In the expression k -8 , what does the letter k represent?
an unknown number (value)
Complete the pattern for the missing numbers.
50, 45, _____, 35, 30, ____
40, 25
Prime or Composite? How do you know?
12
Composite
1 x 12, 2 x 6, 3 x 4
True or False?
Prime Factorization of 12
3 x 4
False
4 is not prime
10 - 2 x 3 + 5
9
Jose needs to get $7 more this week to reach his goal of $40 to buy a new video game. Write an expression using m to find the total amount of money Jose has so far.
m + 7 = 40 or
40 - 7 = m
Complete the pattern.
120, 60, ______, 15
30
Prime or Composite? How do you know?
23
Prime
Factors - 1 x 23
True or False?
Prime Factorization of 20
2 x 2 x 5
True
2 x 2 x 5 =20 and are all prime numbers
3 + 4 (7 - 2) - 10
13
If h represents a number, write an expression that means "6 less than a number."
Find the 6th number in the pattern.
40, 80, 120
240
Prime or Composite? How do you know?
45
Composite
Factors 1 x 45, 3 x 15, 5 x 9
True or False?
Prime Factorization of 36
3 x 3 x 4
False.
4 is not prime
16 - 2 (9 - 5 + 1)
6
Rossy fills 7 boxes with candy for Halloween. If c is the number of candies she put in each box, write an expression to find out how many candies in all.
7c
7 x c
Find the 5th number in the pattern.
360, 340, 320,
280
Prime or Composite? How do you know?
51
Composite
factors - 1 x 51, 3 x 17
True or False?
Prime Factorization of 52
2 x 2 x 2 x 2 x 3
False
2 x 2 x 2 x 2 x 3 =48
4 (2 + 5 x 3) - 8
60
Mrs. Millender brought in pencils for some students in her class. If p represents the pencils, write an expression for Mrs. Millender sharing the pencils with 8 students.
p / 8
Complete the pattern
486, 162, _____, 18, 6, ____
2, 54