Unit 1 Expressions Review

Solve the following:
-2 x (3 + 8 ÷ 4)²

• -16
• 1.375
• 4
• -50

Simplify:
[25-(13+4)+4] ÷ 3

• 6
• 2
• 3
• 4

True or false:
Addition ALWAYS comes before subtraction.

• True
• False

What does 3² mean?

• 3 x 2
• 3 x 3
• 2 x 2 x 2

• 4

• 5

• 80

• 160

What is the first operation used in solving this problem:

2 ⋅ (3 + 8 ÷ 4)²

• multiplication

• addition

• division

• subtraction

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

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

• addition
• multiplication
• subtraction
• exponents

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

• 20
• 31
• 36
• -4

What step would I do second ? (4-2) x 9 + 7 =

• multiplication
• subtraction
• addition
• dividing