# Ratios%20and%20Vocabulary - PowerPoint PPT Presentation

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## Ratios%20and%20Vocabulary

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### Ratios and Vocabulary Lesson 2 * (5 min) Time passed In-Class Notes Teachers should review answers with students and discuss any questions that they may have about ... – PowerPoint PPT presentation

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Title: Ratios%20and%20Vocabulary

1
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
3
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
Agenda
7
Launch Continued
Agenda
8
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
9
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
votes. Write a ratio in words comparing Juan and
Kevins votes. Step 1 Write a ratio of Juans
to 8 Kevins votes Step 2 Simplify the
ratio 5 Juans votes to 2 Kevins
votes Step 3 Write this ratio in words For
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
11
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
Agenda
16
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
17
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