1 3 ALGEBRAIC EXPRESSIONS Evaluate and simplify algebraic
1 -3 ALGEBRAIC EXPRESSIONS Evaluate and simplify algebraic expressions by substituting and using order of operations.
How to… • You will need to translate words into mathematical operations. • What are some words or phrases for: • Addition Subtraction • Multiplication Division
Practice • Ex: The product of 9 and b • 9 b • 26 less than 12 (**when you see “less than” notice that the first number goes last) • 12 - 26 You try: • The quotient of 6 and 3 • 6 more than twice the points • Two times the sum of a and b
Modeling a Situation • You start with $20 and save $6 each week. What algebraic expression models the total amount you save? • What do we know? • How can we make an algebraic expression using what we know? • 20 + 6 w
Evaluate an Algebraic Expression • Replace variables with values • Use order of operations to simplify • Ex: q + r – 15 if q = 21 and r = 18 • 21 + 18 -15 • 39 – 15 • 24
Simplifying Expressions •
1 -4 SOLVING EQUATIONS Solve problems by writing equations.
Equation • An equation is a statement that two expressions are equal. • Equations have an equal sign, expressions do not.
Properties of Equality •
Solving •
No Solution or Identities •
Literal Equations •
Assignment • Odds p. 22 #13 -21 p. 30 #21 -33
- Slides: 13