Unit 4 Vocab and Practice

An expression is a math phrase that has:

• operations, numbers, and sometimes variables

• words

• pictures

• an equal sign

An equation is a

• math phrase

• math sentence with no equal sign

• math sentence with an equal sign in the middle

• an inequality

Which is an example of an equation?

• 1 + 1

• 8

• 4 + 4 = 8

• 4 + 4

Which is NOT an equation?

• 10 = 5 + 5

• 3 = 1 + 2

• 11 - 4 = 7

• 11 - 4

True or False? A variable is a letter used to represent an unknown number

• True

• False

Which is an example of a variable?

• 20

• 5

• 2

• x

Which is another example of a variable?

• 10

• 2

• a

• 5

What is the vocab word for "the parts of an expression that are added and subtracted"

• Equation

• Term

• Variable

• Like terms

Combining "Like Terms" is like

• putting apples with apples and bananas with bananas

• adding the total of all fruit

• throwing the fruits in the trash can

• eating the fruit

Simplify this expression by combining like terms:

a + a + b + b + b

• bababababbabababba

• a + b + 2

• 3a + 2b

• 2a + 3b