Reading and Writing Algebraic Expressions

4 less than a number 

• 4/n

• 4+n

• n/4

• n-4

Nate has 6 fewer CDs than Emily.  If c represents the number of CDs Emily has, which expression tells how many CDs Nate has?

• 6-c

• 6+c

• c-6

• c+6

the difference of a number and six

• x + 6

• x - 6

• 6 - x

• x/6

twice a number plus six

• 2x + 6

• 2x - 6

• 2x / 6

• 2x (6)

The table shows Sandra's weekly earnings, y , based on the number of hours she works. Which equation can Sandra use to calculate her weekly earnings when she works x hours?

• y = 8x

• y = 5x + 40

• y = 10x

• y = 10x + 80

Write each phrase as an algebraic expression.

Mathematical Equivalence

ON

Tia is 8 years younger than her sister Annette. Annette is y years old. Write an algebraic expression that describes Tia's age.

Let y represent Annette's age.

Mathematical Equivalence

ON

The table shows Sandra's weekly earnings, y , based on the number of hours she works. Which equation can Sandra use to calculate her weekly earnings when she works x hours?

​ (a)  

• y = 8x

• y = 5x + 40

• y = 10x

• y = 10x + 80

Write an expression to represent "10 less than x cubed"

Mathematical Equivalence

ON

6 more than twice x can be written as (a)  

• 2x + 6

• 6x + 2

• 2x + 6x

• 6 + x

• 1/2x + 6