Evaluating Algebraic Expressions

Perry has 17 fewer baseball cards than Pete.
If b represents the number of cards Pete has, write an expression for how many baseball cards Perry has.

• b + 17
• b -17
• 17 - b
• 17 + b

Sarah has some money in the bank, then she earned $12 more. Define a variable and write an expression for how much money she has in total.

• b = bank
  b + 12
• m = money
  m + 12
• m= amount of money she has in the bank
  m + 12
• m = amount of money she earned
  m + 12

Translate:
42 less than a number x

• 42 - x
• x - 42

Translate:
12 fewer pencils than the number of pencils, p, in my desk

• 12 - p
• p - 12

Evaluate x + 8 if x = 2

• 6

• 8

• 10

• 12

Evaluate 4a  if a=5

• 45
• 9
• 20

Evaluate 2n + 7 if

n = 7

• 34

• 21

• 14

6a - 3d
when a = 1, d = 2

• 3
• 12
• 1
• 0

Evaluate 3x + 8   if x = 2

• 13
• 14
• 15
• 16

Evaluate 4y  if       y = 3

• 7
• 12