Writing and Evaluating Expressions

What is an algebraic expression?

• a letter or a symbol used to represent an unknown value

• an expression that contains one or more variables and may also contain an operation symbol such as + or -

• a specific number whose values does not change

Tags

CCSS.6.EE.A.2B

Which of the following expressions contains a variable?

• 7+3

• 144÷12

• 7 + 15n

• 6(5)

Tags

CCSS.6.EE.A.2B

Which expression shows the sum of 12 and x?

• 12x

• 12-x

• 12+x

Tags

CCSS.6.EE.A.2A

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

Tags

CCSS.HSA-SSE.A.1A

Students brought in 300 canned goods for the food drive on Monday. On Tuesday students brought in x more than the day before. Write an expression for how many canned goods students brought on Tuesday.

• 300 + x
• 300 - x
• 300x
• x - 300

Tags

CCSS.6.EE.B.6

Mary baked some cookies on Saturday. On Sunday she baked twice as many cookies as the day before. If c represents the number of cookies she made on Saturday, write an expression for the number of cookies she made on Sunday.

• c + 2
• c - 2
• c / 2
• 2c

Tags

CCSS.6.EE.B.6

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

Tags

CCSS.HSA-SSE.A.1A

Evaluate x + 8 if x = 2

• 6

• 8

• 10

• 12

Tags

CCSS.6.EE.A.2C

Evaluate 4a  if a=5

• 45
• 9
• 20

Tags

CCSS.6.EE.A.2C

Evaluate 2n + 7 if

n = 7

• 34

• 21

• 14

Tags

CCSS.6.EE.A.2C