3.3 proportions determine when two rates are proportional day 3
TRANSCRIPT
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3.3 Proportions
Determine When Two Rates Are Proportional
Day 3
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Math Minute Directions• Work by yourself• You have 15 minutes to
complete and/or correct all 10 questions
• When you’re done…• Math Facts in a Flash• Accelerated Math• Incomplete work• D-11 Math Review
Raise your hand if you have a question!
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Math Minute 10 ANSWER KEY
1. False2. True3. False4. 12/2, 8/8, 22
5. 3/86. 7. A8. 69. 1/610. 1/3
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Math Minute Extension Time
• If you are an A-Team Member, you may go to the following websites:– Mathplayground.com– Funbrain.com
• If you are NOT an A-Team Member, your computer needs to be closed. You should be working on one of the following things:– Incomplete/missing work– D-11 Math Review 1.4 DUE FRIDAY– Extra Credit
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Announcements• D-11 Math Review 1.4 DUE Friday• Math MAP test on Thursday• STAR Math Test on Monday• December Newsletters DUE Friday
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Results from Last Class
Due to the Project Night, I didn’t get an opportunity to review your work.
Mr. Perez stated you needed review on #3 (% of a number) and #8 (52 weeks in a year) on Math Minute 9. That was the same for my 5th period as well.
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Data from Chapter 3 Pre-Test# Section Skill
1 3.1 Ratio as a fraction in simplest form
2 3.1 Ratio as a fraction in simplest form
3 3.1 Find the unit rate
4 3.1 Find the unit rate
5 3.3 Tell whether the ratios form a proportion - expression
6 3.3 Tell whether the ratios form a proportion - expression
7 3.3 Tell whether the ratios form a proportion - in words
8 3.4 Write a proportion
9 3.4 Write a proportion
10 3.5 Solve the proportion using multiplication
11 3.5 Solve the proportion using multiplication
12 3.5 Solve the proportion using multiplication – Distributive Property
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LEARNING TARGET3.3 Proportions – How can you tell when two ratios form a proportion?
Today I can determine if two rates are proportional using multiplication, division, or the Cross Products Property by correctly answering at least 2 out of 3 STUDENT questions.
TCAP STANDARDS1.4a Use the relationships among fractions, decimals, and percents, including the concepts of ratio and proportion, in problem-solving situations.
6.1a Use concrete materials or pictures to explain how ratios, proportion, and percents can be used to solve real-world problems.
AGENDA• (15 min) Math Minute 10• (10 min) Intervention/Extension• (5 min) Announcements & Results• (5 min) Lesson Overview• (10 min) 3.3 Lesson Warm-Up:
Equivalent Fractions• (20 min) MODEL Determine Whether
Two Ratios Form A Proportion (x & ÷)• (20 min) MODEL Using Cross Products• (5 min) Exit Ticket
KEY VOCABULARYUnit RateProportionCross Products Property
HOMEWORK & UPCOMING EVENTSMissing & Incomplete AssignmentsD-11 Math Review 1.4 DUE Friday
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3.3 Lesson Warm-UpPick 1 Equivalent Fractions
1. Is 4/10 equivalent to 10/25? Explain.
2. Is 6/4 equivalent to 8/12? Explain.
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3.3 Lesson Warm-UpPick 1 Equivalent Fractions
1. Is 4/10 equivalent to 10/25? Explain. Answer: Yes!
2. Is 6/4 equivalent to 8/12? Explain. Answer: No!
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Lesson Check-In
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Set-Up Your Record SheetWE DO
YOU DO
NameDatePeriod
p. 112
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MODEL Determining ProportionsTEACHER: p. 112 Example 1A
Tell whether the ratios form a proportion.
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MODEL Determining ProportionsTEACHER: p. 112 Example 1A
Tell whether the ratios form a proportion.
Answer: Yes
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MODEL Determining ProportionsCLASS: p. 112 Example 1B & OYO #1
Tell whether the ratios form a proportion.
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MODEL Determining ProportionsCLASS: p. 112 Example 1B & OYO #1
Tell whether the ratios form a proportion.
Answer: No
Answer: Yes
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MODEL Determining ProportionsSTUDENT: p. 112 OYO #2-4
Tell whether the ratios form a proportion.
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MODEL Determining ProportionsSTUDENT: p. 112 OYO #2-4
Tell whether the ratios form a proportion.
Answer: No
Answer: No
Answer: Yes
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Lesson Check-In
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Can We Always Use Multiplication and Division?
1. Go to p. 114 and look at the practice problems #5-16
2. Which questions can you use the method we just practiced? How do you know?
3. Which questions will require a different method? How do you know?
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Cross Products Property
Virtual Nerd video
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MODEL Using Cross ProductsTEACHER: p. 112 Example 1A
Tell whether the ratios form a proportion.
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MODEL Using Cross ProductsCLASS: p. 112 Example 1B & OYO #1
Tell whether the ratios form a proportion.
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MODEL Determining ProportionsSTUDENT: p. 112 OYO #2-4
Tell whether the ratios form a proportion.
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Lesson Check-In
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Exit Ticket
Tell whether the two rates form a proportion.
7 inches in 9 hours; 42 inches in 54 hours.