Expressions and Equations (Review)

What is an expression?

• A combination of numbers, variables, and mathematical operations.

• A set of rules that prioritize the order of calculations.

• A mathematical operation, written as bⁿ, involving two numbers, the base b and the exponent or power n.

How would you present 4 x 4 x 4 using an exponent?

• 4 x 3

• 3⁴

• 4³

Evaluate 5².

• 7

• 10

• 25

What would the expression look like written?

The sum of a number b and 5.

• b + 5

• b - 5

• b x 5

What would this expression look like written?

5 times the difference of 6 and a number w.

• 5(6-w)

• 5 x 6 - w

• (6-w) ÷ 5

How many terms are in the expression below?

7a + 4b - 3

• 1

• 2

• 3

Evaluate 2y + 3 when y = 4.

• 5

• 7

• 11

• 15

Which expression is equivalent to the one below?

2(x+3)

• 2x + 5

• 2x + 6

• 6x

Which expression is equivalent to the one below?

6(4x+3y)

• 10x + 9y

• 24x + 18y

• 10x + 18y

What is an equation?

• Two expressions that are equivalent to one another.

• Adding, subtracting, multiplying and dividing.

• Order of operations.