Presentation is loading. Please wait.

Presentation is loading. Please wait.

Copyright©amberpasillas2010. An expression is NOT an equation because it DOES NOT have an equal sign. There are 2 types of expressions. 5 + 84 Numerical.

Similar presentations


Presentation on theme: "Copyright©amberpasillas2010. An expression is NOT an equation because it DOES NOT have an equal sign. There are 2 types of expressions. 5 + 84 Numerical."— Presentation transcript:

1 copyright©amberpasillas2010

2 An expression is NOT an equation because it DOES NOT have an equal sign. There are 2 types of expressions Numerical 3x 3x + 10 Algebraic Notice there are no equal signs in these expressions so they are not equations !

3 copyright©amberpasillas2010 A numerical expression contains only numbers and symbols and NO LETTERS. 5 times 3 plus 8 (53) + 8

4 copyright©amberpasillas2010 An algebraic expression contains only numbers, symbols, and variables. It is sometimes referred to as a variable expression. The product of 3 and x 3x The sum of m and 8 m + 8 The difference of r and 2 r - 2

5 copyright©amberpasillas2010 What is a variable? A variable represents an unknown value. 1) 4 + x 2) 10 – ? 3) 5y 4) 20 A variable can be any letter of the alphabet since it represents an unknown.

6 copyright©amberpasillas2010 Word Phrases for multiplication are: The product of 5 and a number c Seven times a number t 6 multiplied by a number d 5 c or 5c 7 t or 7t 6 d or 6d

7 copyright©amberpasillas2010 The Placement rule for multiplication is: The product of 5 and a number c Seven times a number t 6 multiplied by a number d 5 c or 5c 7 t or 7t 6 d or 6d Always write the variable AFTER the number.

8 copyright©amberpasillas2010 Evaluate means to find the value of an algebraic expression by substituting numbers in for variables. m = m ?

9 copyright©amberpasillas2010 Evaluate means to find the value of an algebraic expression by substituting numbers in for variables. r = r ?

10 copyright©amberpasillas2010 Evaluate the variable expression when n = 6. 1)2) Evaluate just means solve by substitution.

11 copyright©amberpasillas2010 Evaluate the variable expression when n = 6. Evaluate just means solve by substitution. 3) 4)

12 copyright©amberpasillas2010 Evaluate the algebraic expression when n = 8. 1)2)

13 copyright©amberpasillas2010 Evaluate the expression if a = 3 and b = 4. 1)2)

14 copyright©amberpasillas2010 Evaluate the expression if a = 3 and b = 4. 3)4)

15 copyright©amberpasillas2010 Evaluate the expression if x = 5 and y = 3. 1) 2)

16 copyright©amberpasillas2010 An expression is NOT an equation because it does not have an equal sign. There are 2 types of expressions. NUMERICAL EXPRESSION: Contains only numbers and symbols. Example: ALGEBRAIC EXPRESSION: Contains numbers, symbols, and variables. Also known as a variable expression. Example: m + 8 A VARIABLE is a letter or symbol that represents a number. Example: x TYPES OF EXPRESSIONS #1

17 copyright©amberpasillas2010 #2 Show the substitution. Show your work down. Circle your answer. Show your work one step at a time down. No equal signs! Evaluate means solve. Evaluate i f x = 3 and y = 4

18 copyright©amberpasillas2010 Take out 2 sheets of paper!!!


Download ppt "Copyright©amberpasillas2010. An expression is NOT an equation because it DOES NOT have an equal sign. There are 2 types of expressions. 5 + 84 Numerical."

Similar presentations


Ads by Google