Expressions

What is the most important difference between an expression and an equation?

• they're spelled different

• an equal sign

• only equations have variables

• only expressions have variables

Tags

CCSS.L.1.5A

CCSS.L.1.5B

CCSS.L.K.5A

Which of the following is a numerical expression?

• 3 - 1 = 2

• 3 - 1

• 3x - 1

• 3x - 1 = 2

What operation is this:

2x

• addition

• subtraction

• multiplication

• division

Tags

CCSS.RI.4.10

CCSS.RI.5.10

CCSS.RI.6.4

CCSS.RI.7.4

CCSS.RI.8.4

Which of the following is not an equation?

• 2 + 2 = 4

• 2x + 4 = 25

• 3(4 + 5)

• 10 - 2x = 4

Which of the following is not a numerical expression/equation?

• 5 - 4 = 1

• 2x + 3

• 17(2-1)

• 21 + 7 = 28

Tags

CCSS.L.1.5A

CCSS.L.1.5B

CCSS.L.K.5A

A variable is...

• the number in front of a letter

• a value that does not change

• numbers and letters separated by operations

• an unknown number represented by a letter

Tags

CCSS.RI.4.10

CCSS.RI.5.10

CCSS.RI.6.4

CCSS.RI.7.4

CCSS.RI.8.4

3x + 8   if x = 2

• 13
• 14
• 15
• 16

Tags

CCSS.6.EE.A.2C

Evaluate x ÷ 4 for x=48

• 12
• 44
• 52
• 192

Tags

CCSS.6.EE.A.2C

Write the following in expanded form. 
10³

• 10+10+10
• 10x10x10
• 3x10
• 1,000

Tags

CCSS.7.EE.A.2

CCSS.HSA.SSE.A.2

Write each product using an exponent. 
4 x 4 x 4 x 4 x 4 

• 4⁵
• 5⁴
• 4⁶
• 4⁶

Tags

CCSS.6.EE.A.1