Evaluating Expressions

Simplify:
[25-(13+4)+4] ÷ 3

• 6
• 2
• 3
• 4

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

• They added wrong numbers

• Multiplied worng

40 - 2⁴ + 8

• 40
• 32
• 24
• 42

True or false:
Addition ALWAYS comes before subtraction.

• True
• False

Solve the following:
(2 + 7 - 1) ÷ 2²

• 16
• 2
• 72.25
• 8.75

3(2x + z) when x=8 and z=2

• 12
• 30
• 54
• 60

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

• 20
• 31
• 36
• -4

(y + z)² when y=5 and z=2

• 7
• 49
• 29
• 14

Which is NOT an equation?

• x+14=32
• 10-2x=10+5x
• 3+x
• 12=0.5x-3

What are the coefficients in the expression
8a + b + 9?

• 8 only
• 1 and 8
• 8 and 9
• 1, 8, and 9