Order of operations

2 + (9² - 4)

• 16
• 77
• 79

6 + (4)3

• 18
• 30
• 13
• 42

(10 + 2) ×10-3

• 145
• 27
• 117
• 53

90 - 5² × 3

• 15
• 240
• 195

What would be my first step to simplify?
3 + 4 x 6 - 4 

• addition
• multiplication
• subtraction
• exponents

18 + (6 – 2) × 2

• 26
• 29
• 44
• 40

Find and explain the error.    
 5 - 3 + 2
     5 - 5
        0

• There is no error.
• Addition was done first and you should have subtracted first
• There is a subtraction error

2x + 5(y - 1) when x=8 and y=5

• 20
• 31
• 36
• -4

Evaluate 2a + 4b 
if a = 10     and    b = 6

• 20
• 24
• 44
• 4

3x + 8   if x = 2

• 13
• 14
• 15
• 16