1 / 10

Algebraic Expressions

Algebraic Expressions. Essentional Question. What is Algebraic Expressions and how do I solve them?. Vocabulary. Algebraic Expressions - an expression containing numbers, variables, and operations ( eg , 3x + y or 5a – 4). Algebraic expressions do not contain equality or inequality symbols.

thai
Télécharger la présentation

Algebraic Expressions

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. Algebraic Expressions

  2. Essentional Question • What is Algebraic Expressions and how do I solve them?

  3. Vocabulary • Algebraic Expressions-an expression containing numbers, variables, and operations (eg, 3x + y or 5a – 4). Algebraic expressions do not contain equality or inequality symbols. • Variables-a symbol for a number we don't know yet. • Expressions-a mathematical term or a sum or difference of mathematical terms that may use numbers, variables, or both. • Equation-a statement that two numbers or expressions are equal

  4. Variables Usually we use letters such as n, t, or x for variables. For example, we might say that s stands for the side-length of a square. We now treat s as if it were a number we could use. The perimeter of the square is given by 4 × s. The area of the square is given by s × s. When working with variables, it can be helpful to use a letter that will remind you of what the variable stands for: let n be the number of people in a movie theater; let t be the time it takes to travel somewhere; let d be the distance from my house to the park. 

  5. Expressions • 3 + 7 • 2 × y + 5 • 2 + 6 × (4 - 2) • z + 3 × (8 - z)

  6. Equations • Equations are useful for relating variables and numbers. Many word problems can easily be written down as equations with a little practice. Many simple rules exist for simplifying equations. • 17 = 2 + 15 • x = 7 • 7 = x • t + 3 = 8 • 3 × n +12 = 100

  7. Solving Expressions • To solve an expression for a given value for the variable, plug the value of the variable into the expression and simplify using the correct order of operations. • Question: If n = 125.17, what is the value of 256.39 - n?Answer: Simply plug in the number for n and solve the expression.256.39 - n = 256.39 - 125.17 = 131.22

  8. Your Turn to Try It!! • If n = 81, what is the value of n ÷ 9? • If n = 590, what is the value of n - 352? • If n = 91, what is the value of 186 + n?

  9. Summarizer • Tell a partner : How you solve an Algebraic Expression?

  10. Homework • Algebraic Expression Worksheet

More Related