Magical Monday1. Take out your math notebook,

pencil, DEAR book.2. Warm UP: Green Book p. 402

(9-16)3. DEAR until we begin

Warm Up Answers: p.402 (9-16)

9) 10%

10) 43/100

11) 3/5

12) 76%

13) 0.32

14) 92%

15) 109/200

16) 7.5%

# correct

8

Before we begin today, some questions for you…

What does the word “percent” literally mean?

What is a very common unit of measure that uses 100 as its scale?

If I wanted to know how much 75% of $1.00 was, what could I think?

What about 75% of $2.00?

“per” – out of“cent” – 100

MONEY! There are 100 pennies in a

dollar

75 “out of 100” pennies is 75¢

75¢ + 75¢ = $1.50

New Process for a bit…• Class set of “books” that remain IN THE CLASSROOM

•Please keep them NICE because they are in use for a couple weeks

•Personal copy of the ACE questions that you may keep and TAKE WITH YOU (and even write on if you want)

•Let’s begin!

Runners, go get your lab sheets and “books” for your group members…

Make sure your notebook cover sheet looks like this:

#. Date Book Brief Description

1. 12-5 C&S Problem 4.1, ACE 1, 2, 15-17, 232. 12-6 C&S Problem 4.2, ACE 3-5, 18-193. 12-7 C&S Problem 4.3, ACE 6-14, 224. 12-12 B&PIII Problem 4.1, ACE

2,3,13,14,27,28(packet)

Big Idea: Calculate tax and total costYou will need: Calculator 4.1 Lab sheet

Remember…(write this down!)Changing a Decimal to a Percent

DP move the decimal 2 to the right then add the %Ex) .53 = 53% Ex) .009 = 0.9%Ex) 0.7 = 70% Ex) 4 = 400%

Changing a Percent to a Decimal

DP move the decimal 2 to the left and remove the %Ex) 68% = 0.68 Ex) 2% = 0.02Ex) 112% = 1.12 Ex) 8.67% = 0.0867

Charlotte 7.25%Washington 6.5%Michigan 6%Colorado 2.9%

Why do you

think there are

so many

differences?

Who decides

what percent

we pay?

CD $7.50

Tax $7.50 (.06) = $0.45

Total $7.95

Hint: Change the percent to a

decimal! Another way:

You would pay $0.06 on every dollar you spend, so multiply 6 cents by 7.5 dollars to get 45 cents. Then, add them together!

Tax: 2 (.06) = .12 Total: 2.00 + .12 = $2.12

Tax: 5 (.06) = .3 Total: 2.00 + .30 = $5.30

Tax: .5 (.06) = .03 Total: .50 + .03 = $.53

Tax: 2 (.07) = .14 Total: 2.00 + .14 = $2.14

Tax: 5 (.07) = .35 Total: 2.00 + .35 = $5.35

Tax: .5 (.07) = .035 Total: .50 + .035 = $.53 or $.54

Since Alexis had to pay $0.06 for each dollar, find how many “.06” are in 4.80 by dividing!

4.80/ .06 = $80 as the original cost!

$0.75 / .05 = $15 was to price of the game

We know he paid $.05 for every dollar he spent, so again, you divide the tax amount by $.05 to get $15!

Make sure your notebook cover sheet looks like this:

#. Date Book Brief Description

1. 12-5 C&S Problem 4.1, ACE 1, 2, 15-17, 232. 12-6 C&S Problem 4.2, ACE 3-5, 18-193. 12-7 C&S Problem 4.3, ACE 6-14, 224. 12-12 B&PIII Problem 4.1, ACE

2,3,13,14,27,28(packet)