1. take out your math notebook, pencil, dear book. 2. warm up: green book p. 402 (9-16) 3. dear...
TRANSCRIPT
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Magical Monday1. Take out your math notebook,
pencil, DEAR book.2. Warm UP: Green Book p. 402
(9-16)3. DEAR until we begin
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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
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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
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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!
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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
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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
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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?
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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!
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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
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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
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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!
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$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!
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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)