Online Algebra Tutoring: Variable Expressions

Algebra Worksheets

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Learn Variable Expressions from Certified Online Algebra Tutor

A variable is a symbol or an alphabetical letter used to represent an unknown number in an expression or an equation. The value of this number can vary. A variable expression is a math expression that consists of variables, numbers and operations (like add,subtract, multiply, and divide)

To translate verbal phrases into variable expressions. Look for key words that indicate addition, subtraction, multiplication, division.

Key Words:

Addition: plus, the sum of, increased by, total, more than, added to.
Subtraction: minus, the difference of, decreased by, fewer than, less than, subtracted from.
Multiplication: times, the product of, multiplied by, of.
Division: divided by, the quotient of.

Let’s understand with an example

The product of two and a number increased by nineteen.

The product of two and a number increased by nineteen. (LOOK FOR KEYWORDS)

Product of indicates multiplication
Increased by indicates addition

To write variable expression, assign a variable to represent the unknown number. You can take any alphabetical letter of your choice!

The product of two and a number increased by nineteen.

eTutorWorld Understands Math Tutoring | Online Math Worksheets are Important Tools

Understanding graphs, charts, and opinion polls in a newspaper, for calculating house and car payments, and for choosing a long-distance telephone service are impossible without strong math skills …and the only way to develop strong math skills is by constant practice.

‘Practice makes a man perfect’ holds true for no other field better than for math. A middle or high school student must set aside a minimum of an hour for math every day. Other than textbooks, worksheets help you revise and understand concepts better.

Our expert tutors prepare online maths worksheets that are age and grade-appropriate. Grade-wise math worksheets for Elementary Math, Arithmetic, Pre-Algebra, Algebra, Geometry, Trigonometry, Statistics, Pre-Calculus and Calculus can be solved to improve math skills, to get ahead or to even catch up.

You may download these FREE online math worksheets in the PDF format, and then print and email us their solutions for a free evaluation and analysis by eTutorworld’smath expert tutors.

You may solve these worksheets by yourself or with your peers while studying together.

The Answer Key at the end of each worksheet allows for a self-evaluation.

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Check Point

Directions: Choose the algebraic expression that correctly represents the phrase provided. Select your answer.

Twenty less than twice a number

20 – 2x
2x+20
2x – 20
None of the above

Three times a number increased by sixteen

3(a + 16)
3a + 16
(16 + 3)a
None of the above.

The product of eight and a number decreased by five.

8(m – 5)
5(8 – m)
8m – 5
None of the above

Sixty divided by nine times a number

60 + 9n
9n/60
60/9n
None of the above

Sarah earns $10 a day working part time at a supermarket. Write a variable expression to represent the amount of money she will earn in p days.

10p
10/p
10 + p
None of the above

Answer Key

2x -20
3a +16
8m-5
60/9n
10p

eTutorWorld Understands Math Tutoring | Online Math Worksheets are Important Tools

You may download these FREE online math worksheets in the PDF format, and then print and email us their solutions for a free evaluation and analysis by eTutorworld’smath expert tutors.

You may solve these worksheets by yourself or with your peers while studying together.

The Answer Key at the end of each worksheet allows for a self-evaluation.

Personalized Online Tutoring

For answers/solutions to any question or to learn concepts, take a FREE CLASS.

Book a Free Class

No credit card required, no obligation to purchase.
Just book a free class to meet a tutor and get help on any topic you want!

Pricing for Online Tutoring

Tutoring Package	Validity	Grade (1-12), College
5 sessions	1 Month	$139
1 session	1 Month	$28
10 sessions	3 months	$269
15 sessions	3 months	$399
20 sessions	4 months	$499
50 sessions	6 months	$1189
100 sessions	12 months	$2249