Ratios%20and%20Vocabulary

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Ratios and Vocabulary Lesson 2
2
Warm Up
OBJECTIVE Students will use ratio language to
describe a relationship between two quantities.
Write a ratio in three ways comparing of
ducks to of pigs. Remember to simplify your
answer! 2 ducks to 1 pig 2 ducks 1
pig Fill in the blank. For every 2 ducks, there
is____ pig.
Agenda
Scaffold
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Warm Up
OBJECTIVE Students will use ratio language to
describe a relationship between two quantities.
Write a ratio in three ways comparing of
ducks to of pigs. Remember to simplify your
answer! 2 ducks to 1 pig 2 ducks 1
pig Fill in the blank. For every 2 ducks, there
is____ pig.
1) a fraction
2) the word, to
3) a colon
Agenda
Scaffold
4
Agenda
OBJECTIVE Students will use ratio language to
describe a relationship between two quantities.
1) Warm Up (Independent)
2) Launch

• If the World Was a Village Video (Independent)

• Follow-up Questions (Partner Work)

3) Explore

• Mini Lesson (Whole Class and Partner Work)

-Challenge (Partner Work)
4) Practice (Partner Work, Whole Class)
5) Summary (Whole Class)
6) Assessment (Independent)
5
Launch
We will practice writing ratios by watching a
video on the world.

• Turn and Talk
• What country were you born in?
• What languages do you speak?
• Be ready to share with class!

Agenda
6
Launch
We will practice writing ratios by watching a
video on the world. This video pretends that
there is a village of 100 people who equally
represent every country and language in the
world. Watch the If the World Were a Village
Video and answer questions 1-14.
Agenda
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Launch Continued
Please check your answers!
Agenda
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Mini Lesson

• Lets answer this question together
• How can we write a ratio using words?
• (ex ) For every 100 people in the village, there
  are 61 people from China.
• SUPER important term for writing ratios
• For every can be used to replace the fraction
  bar, colon or word to in a ratio
• For each can also be used to replace the
  fraction bar, colon or word to in a ratio

Agenda
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Explore

• For every and for each can be used to replace
  the fraction bar, colon or word to in a ratio
• (ex 1) Write a ratio in words comparing beaks to
  wings for an eagle.
• Step 1 Write a ratio of beaks to wings
• 1 beak 2 wings
• Step 2 Write this ratio in words
• An eagle has

We can also say, An eagle has 2 wings for each
beak.
Why does beak not have a letter s at the end?
There is only 1 beak so we do not need to make
the word plural.
We use for each when we only have 1 thing being
compared, like 1 beak!
Agenda
10
Explore
We can also start sentences with for every, lets
try! (ex 2) In a class election, Juan received
20 votes and Kevin received 8
votes. Write a ratio in words comparing Juan and
Kevins votes. Step 1 Write a ratio of Juans
votes to Kevins votes 20 Juans votes
to 8 Kevins votes Step 2 Simplify the
ratio 5 Juans votes to 2 Kevins
votes Step 3 Write this ratio in words For
every, 5 votes that Juan received Kevin
received 2 votes.
Did you simplify the ratio? Lets add a new step!
Are the ratios 20 to 8 the same as 5 to
2?
Yes! 20 to 8 and 5 to 2 equivalent fractions or
equal fractions!
Agenda
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Explore Try with a Partner
(ex 3) Kaylee buys 2 posters that are the same
size. She wants to hang up each poster using
the following push pins. Write a sentence
using for each to answer the question. How many
push pins should she use for each poster? Step
1 Write a ratio of push pins to posters 8 push
pins 2 posters Step 2 Simplify the ratio 4
push pins 1 poster Step 3 Write this ratio
in words Kaylee needs 4 push pins for each
poster. For each, poster, Kaylee needs 4 push
pins.
Agenda
12
Challenge Try with a Partner
(ex 4) Brian also wants to decorate his room.
He has 6 posters that need the same ratio of push
pins as Kaylees Posters. How many push pins
does Brian need to hang up his posters? - Draw
a picture and explain your steps!
Agenda
13
Challenge Try with a Partner
(ex 4) Brian also wants to decorate his room.
He has 6 posters that need the same ratio of push
pins as Kaylees Posters. How many push pins
does Brian need to hang up his posters? - Draw
a picture and explain your steps!
Explanation Since we have 4 posters and each
poster needs 4 push pins, we know that Brian
needs at total of 16 push pins.
Fancy Algebra Way
Agenda
14
Practice
You have 5 minutes to work with your partners on
this class work, good luck!
Agenda
15
Practice - Answers
Agenda
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Summary
We can use the phrase, for every, to help us
write ratios as sentences! Turn and
Talk (ex) Calvin told his friend that his cat
has 2 tails for every 1 ear. Is he right? Why
or why not? Calvin is wrong. He should have
said that his cat has 2 ears for every 1 tail.
If Calvin was right then he has a cat with 1 ear
and 2 tails, ek!
Agenda
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Assessment

• For 1 and 2, fill in the blanks
• 1) We can write ratios as sentences using the
  phrase,
• _______ _________ .
• A human being has ____ fingers for every _____
  nose.
• A brownie recipe calls for 3 cups of white sugar,
  2 cups of
• brown sugar and 1 cup of flour. Write a sentence
  comparing
• cups of flour to cups of brown sugar.
• 1 cup of flour 2 cups of brown sugar
• A brownie recipe has 1 cup of flour for every
• 2 cups of brown sugar.

Agenda