ORDER OF OPERATIONS & EVALUATING
Evaluate: 3 + 2 · 4
11
3 cats and 5 dogs. Ratio of cats to dogs?
3:5
What is 50% of 20?
10
In 4x + 7, what is the constant?
7
Simplify: 2x + 3x
5x
Evaluate: 5²
25
4 apples cost $8. Cost of one apple?
$2
What is 10% of 60?
6
In 8 + 2c, what is the variable?
Simplify: 4x + 2 + 3x
7x + 2
Evaluate 2x when x = 6
12
6 blue pens, 4 black pens. Ratio of blue to black?
6:4 (or 3:2)
5 out of 10 students. What percent?
50%
In 5x + 3, what is the coefficient?
5
Can you combine 5x + 3? Why or why not?
No — not like terms
Evaluate 3a + 2 when a = 4
14
Apples to oranges is 3:2. How many pieces of fruit in one “group”?
5
3 out of 4 students. What percent?
75%
Which property changes the ORDER of terms?
Commutative
Distribute: 3(x + 4)
3x + 12
Evaluate 2(c + 3) when c = 5
16
Apples to oranges is 3:2. Ratio of apples to TOTAL?
3:5
If you ate 25% of the cookies, what percent is left?
75%
Which property lets you multiply 3(x + 4) into 3x + 12?
Distributive
Is 3(x + 4) the same as 3x + 4?
No — it’s 3x + 12