Variable Expressions Worksheets
What are Variable Expressions? Mathematics is full of different forms of expressions and concepts. One of the most common expressions in mathematics is a variable expression which is widely used in mathematics to solve problems. Do you want to know what a variable expression is? First, understand what a variable is? A variable is an alphabetical letter used in a mathematical expression or equation to represent a number. Now, do not let the fact that it's a number confuse you. Since it is used to express a number, you treat it like a number while solving the expression. To be more precise about a variable, it is a symbol that hides in itself an unknown value. You can use any symbol as a variable, but most commonly, you will find these letters being used as variables, a, b, c, d and x. An example of a variable expression is 1000x. Here x is a variable that represents an unknown value being multiplied with 1000 and can only be found out when you substitute x with a value.
Demonstrates how to take an algebraic sentence and rewrite it as an equation. Practice problems are provided. Write an algebraic expression for the difference of x and 7. The word difference means subtract. The algebraic expression would be x - 7 This is an algebraic expression because it contains at least one number (7), at least one variable (x), and at least one arithmetic operation (subtraction).View worksheet
Explains how to translate an algebraic word problem into an equation. Practice problems are provided. Translate the word problem into an equation. My age in years y plus 20 is equal to four times my age, minus 10. The first expression stands for "my age in years plus 20", which is y + 20. This is equal to the second expression for "four times my age, minus 10", which is 4 × y - 10. Setting these two expressions equal to one another gives us the equation: y + 20 = 4 × y - 10View worksheet
Independent Practice 1
Write each sentence as an equation. The answers can be found below.View worksheet
Independent Practice 2
Features another 20 Variable Expressions problems.View worksheet
12 Variable Expressions problems for students to work on at home. Example problems are provided and explained.View worksheet
10 Variable Expressions problems. A math scoring matrix is included.View worksheet
Homework and Quiz Answer Key
Answers for the homework and quiz.View worksheet
Lesson and Practice Answer Key
Answers for both lessons and both practice sheets.View worksheet
Thoughts of Albert Einstein
For those who are having trouble with algebra, take heart: "Do not worry too much about your difficulties in mathematics, I can assure you that mine are still greater."