PEMDAS
Prime or Composite?
Solve
Solve
???
100

SIMPLIFY 

20(11-9) – 2(5)



30

100

Which two numbers are neither prime nor composite? 

0 and 1

100
3 + 4 x 5
23
100

14 - 2 x 7

0

100

A truck delivered 6 loads of bricks to a worksite. Each load was composed of 128 bricks. The bricks were placed in stacks of 16 after they were delivered. Which equation can be used to find s, the number of stacks?  

s = (6x18)/16 

200

Why is it important to know PEMDAS as a mathematician?

So everyone can solve every problem the same (correct) way.

200

Which numbers are composite? 


9, 23, 55, 78

55 and 78

200
7 + (2 x 4) - 1
14
200

49 ÷ (3+4) + 5

12

200

Three siblings mowed fields last month to earn money. 

 Ryan mowed 36 acres. 

 Holly mowed 3 more acres than Ryan. 

 John mowed twice as many acres as Holly. 

Which equation can be used to find j, the number of acres John mowed?

j = (36 + 3) x 2

300

What is the saying we use to remember the correct Order of Operations?

Please Excuse My Dear Aunt Sally.

PEMDAS

300

Eric is thinking of a prime odd number between 30 and 40. What could his number be? 

31 or 37

300

89 − [2(3 × 4) + (9 × 2)]

47

300
5 + 14 ÷ 2 × 5
40
300

Mrs. Chan gave her 3 children a total of $75 to spend at a movie theater. Each child received the same amount of money. Each child spent $12 for a ticket and $9 for popcorn and drinks. Which equation can be used to find m, the amount of money each child had left over?

(75 / 3) - (12 + 9) = m

400

What 4 ways could you see multiplication represented using m?

3 x m

3 * m

3m

3(m)

400
  • Jason wrote factor pairs for the following number 144.  Which of the factor pairs contain only composite numbers.
    1 × 144
    2 × 72
    3 × 48
    4 × 36

4 X 36

400

20 – (5+3) x 2 + 4

8

400

2(4-1) + 4(5+ 1)

30

400

What is a prime number? 

A number that has ONLY 2 factors

500

What 2 things might you see that stand for P

parenthesis ( )

brackets [  ]

500

Which list of numbers contains 2 prime numbers and 2 composite numbers? 

a.17, 23, 29, 31 

b.15, 21, 27, 35 

c.19, 27, 31, 33 

d.23, 29, 31, 39 

C

500

[(5 x 4) – 6 ÷ 2] + 9

26

500

2 [(4.2 + 6.01) x (16 ÷ 4)] - 8 

73.68

500

What is a composite number? 

A number that has MORE THAN 2 FACTORS