Algebra and Algebraic Thinking

If j = 4, what is 8j?

• 84

• 12

• 2

• 32

18 + f = 30

f = ?

• 12

• 10

• 48

• 22

Do variables change value depending on the problem?

• yes

• no

g - 14 = 50

• 36

• 64

• 74

• 26

"Variable" comes from the word "vary." What does vary mean?

• to add

• to solve

• to change

• to calculate

If w = 4, solve 4w + 6

• 50

• 16

• 44

• 22

Edward's pizza had 23 pepperonis. Then he picked off n pepperonis. Now there are 12 pepperonis left. What algebraic equation shows this situation?

• 12n = 23

• n + 23 = 12

• 23 + 12 = n

• 23 - n = 12

Julius has v gold coins. After some time, he doubled his amount of gold coins. Which algebraic expression shows how many gold coins Julius has?

• 2v

• 2 + v

• 2 - v

• 2 / v

BONUS:

r + 16 = 5r

What is the value of r?

• 2

• 4

• 6

• 8