Lesson 1.2 Order of Operations Algebra 1 Lesson 1.2 Order of Operations

Warm-up (IN YOUR NOTEBOOK) Write a expression or equation from the phrase. 7 less than the product of 3 and a number 3 times n minus the quotient of t and 5 is 15 If I raise my hand and count to four what should you do? Who gets to open the door?

Answers to Homework (CHECK THEM) 21) r=13n 22)C= 8.5n 23)t=.4n 24)p=8n 25)9+k-7 26)5n+6.7 27)37t-9.85 28)3b/4.5 29)15+ (60/w) 30)7-3v 31)5m-(t/7) 32)(p/14)+(q/3) 33)8-9r 43)a)d=drop height f=height of bounce f= (1/2)d b) 10 ft

The Coordinate Plane You need to know how to …. 1) Label the quadrants and axes 2) Plot points (x,y) a) e (1,6) b) f (-3,2) c) g (4,-1) d) h (-2,-3) 3) Identify points a) a b) b c) c d) d (-8,-2) (2,3) (0,-3) (6,-5)

Scatter Plots and Correlation Positive ______ correlation No Negative ______ correlation ______ correlation

1.2 Exponents and Order of Operations What does it mean to Simplify ? What does it mean to evaluate? Exponent Vocabulary: 4 24 24 base: _______ Exponent: ______ Power:_____ X3 base: _______ Exponent: ______ Power:_____ 2 x 3 X3 Write in exponential form . 1) 5·x·x·x·x·x 2) 3·4·a·a·a

Please Excuse my Dear Aunt Sally Order of Operations P E MD AS Parenthesis (Grouping Symbols) Exponents Multiplication, division (left to right) Addition, subtraction (left to right) Please Excuse my Dear Aunt Sally

Why do you need an Order of Operations? 3(5)+14÷2 15+14÷2 15+7 22 3(5)+14÷2 15+14÷2 29÷2 14.5

Order of Operations Simplify. 1) 2)

Order of Operations Simplify. Evaluate 4) When x= 5 and z = 6

Order of Operations Activity Each Group will get a pack of 15 note cards. Fan and Pick 1st person fan out the cards 2nd person pick a card Everyone solve the problem (write it on your paper) 3rd person share the correct answer If you did not get a correct answer check with your group, if you all can’t determine how to get the answer, call me over. 1st person rotates around with every problem. Continue for all 15 problems or until I stop you.

Homework: See your Agenda JOURNAL What is the order of operations ? What is a good way to remember the order of operations? Why do you think that mathematicians decided on an order of operations? Homework: See your Agenda