Lesson #4 - Ratio Language & Equivalent Ratios

8/11/2019 Lesson #4 - Ratio Language & Equivalent Ratios

1/12

RATIOS, UNIT RATES &

PROPORTIONSDAY 3Van Siclen Community Middle School

Grade 6 Math

Class 602/603/604/605

Mr. E

September 16, 2014


2/12

TODAYS LESSON LINK!

WWW.TINYURL.COM/VSCMATH3


3/12


4/12

DO NOW6 MINUTES

1) Look at the table on the right. Mr. E says

that there are 2 times as many boys asthere are girls. Mr. Campbell says thereare 3 times as many boys as there aregirls. Who is correct? Explain.

Girls Boys T

4 12

5 15

7 21

2) Mr. E wanted to write a ratio of thenumber of TURKISH candies to the

number of Kit Kat candies in the candystore He wrote 2:6 Is he correct? Explain.

3) Use ratio language to describe ratiorelationship between the triangles onthe right.


5/12

TIMES TABLES PRACTICE! (2, 3, 4 & 5

4 x 1 = 4

4 x 2 = 8

4 x 3 = 12

4 x 4 = 16

4 x 5 = 20

4 x 6 = 24

4 x 7

4 x 8

4 x 9

4 x 1

4 x 1

4 x 1

3 x 1 = 3

3 x 2 = 6

3 x 3 = 9

3 x 4 = 12

3 x 5 = 15

3 x 6 = 18

3 x 7 = 21

3 x 8 = 24

3 x 9 = 27

3 x 10 = 30

3 x 11 = 33

3 x 12 = 36


6/12

LESSON OVERVIEW

A _____________ is a comparison between two numbers or thin

Yesterday, we learned about using ratio language to describratios. For example, if we compared the wallpapers in the cla

can say: For every 3 green wallpapers, there are 3 pink wallp

Today we will learn about equivalent ratios.


7/12

Mr. E and Mr. Campbell are usingstring to create a math project. Theratio of the length of Mr. Es string tothe length of Mr. Campbells string is7 to 3. Can you sketch a drawing torepresent this ratio? Can we draw atable to represent this ratio?

If so, how many units draw for Mr. Es part o

How many units shouMr. Campbells part o

We dont know how much each unit of the tapediagram represents. What if each unit represented 1inch. What would be the length of Mr. Es part of the

string? Mr. Campbells?

What is the ratio of the ribbons?

What if each unit represented 2inches. What would be the length

of the ribbons?

What is the ratio of the leMr. Es string to the length

Campbells string now?

Ratios Continued


8/12

= 7:3

2 2 2 2 2 22 = 14:622 2

= ?3 3 3 3 3 3 3 333

What do these 3 ratios have in common?3 minu


9/12

EQUIVALENT RATIOS PART I5 MINUTES

Mr. E and Mr. Campbell createmath problems for VSC Math. Theratio of the number of problems Mr.E creates to the number ofproblems Mr. Campbell creates is 2to 3.

If Mr. E creates 4 problemany problems does Mcreates? Sketch a moddiagram) to show how

List 2 other ratios equivalent to 2:3.

Sketch/model oneof them.


10/12

EQUIVALENT RATIOS PART II5 MINUTES

Mr. E and Mr. Campbell createmath problems for VSC Math. Theratio of the number of problems Mr.E creates to the number ofproblems Mr. Campbell creates is 2to 3.

If Mr. Campbell createproblems, how many pdoes Mr. E create? Ske(tape diagram) to showknow

List 2 other ratios equivalent to 2:3.

Sketch/model oneof them.


11/12

EQUIVALENT RATIOS PART III7 MINUTES John took a long multiple-choice

test at the end of the year. The ratio

of the number of problems John gotincorrect to the number of problemshe got correct is 2:5.

If John got 8 incorrect, questions did he get rig

Use a tape diagram to you found your answer

If he missed 20 questions, how many

did he get right? Can you come up

with another ratio to show the ratio

of how many questions John gotwrong to the number of questions he

got right? How did you find the

numbers?

Can your grou desc

create equivalent ra


12/12

Homework #6Due September 17, 2014 - Proble

Documents

Lesson #4 - Ratio Language & Equivalent Ratios