 Warm Up!! (Left side) What is the difference between an Equation and an Expression??

Order of Operations  PEMDAS Rules?  Operation vs. Step

Order of Operations  What do I do first? (12 – 6 + 3) – 3

Order of Operations  Tricks to Remember  3(2)  4 – (– 5 )  3 – 12  ( – 6) ( – 4 )  ( – 2 ) 2 vs. – 2 2

 Warm Up!! (Left side) Why do we need x’s and y’s (variables)?? How does that relate to word problems?

Verbal Expression  Mathematical Expression  Key words?? (Left)  More than  Double  Half  Fewer

 Are these the same? (Guess left, write right)  The sum of 5 times a number and 13  5 times the sum of a number and 13 Verbal Expression  Mathematical Expression

1. 3 less than 4 times a number 2. The sum of 6 times a number and more than half the product of 7 and a number Verbal Expression  Mathematical Expression

How many ways can we write this as a verbal expression? (5x + 1) – 3 Verbal Expression  Mathematical Expression

Properties of Equality Commutative Associative Distributive Sounds like… Def in Math

Properties of Equality 1. 3x – 7 + 4x – a + 2(4 – 6a) 3. 7(2x + 3) + 4(x – 1)4. 9x – (11 – 14x)