Expression and Equations

Find and explain the mistake.    
 5 - 3 + 2   = 5-5 = 0

• You did the subtraction wrong
• You did the addition first, but should have done the subtraction first.
• The additon is correct, but the subtraction is wrong.
• There is no mistake.

2 + (9² - 4)

• 16
• 77
• 79

4³ + 2 x 8

• 75
• 28
• 80

Evaluate the expression:
15f - 60  if f = 5

• 15
• 95
• 30
• -45

What would you solve first?
3 x 48 / (15 - 3)

• 3 x 48
• 48 / 15
• 15 - 3 
• 48-12

Evaluate the expression:
24/(4g)   if g = 2

• 12
• 3
• 0.57
• 57

(7 + 41) ÷ 2 – 15

• 19
• 9
• 25
• 3

Evaluate 3²

• 6
• 9
• 27
• 3

What does the ( E )in PEMDAS mean?

• experience
• exponents
• examples
• evidence

Solve the equation: 
x + 7 = 12

• x = 5
• x = 19
• x = -5
• x = 84