Introduction%20to%20Ratios

1
Introduction to Ratios
2
Warm Up
OBJECTIVE Students will write real-world
quantities as ratios and explain their meaning.
Language Objective Students will define ratio
and will be introduced to ratio language. .
 
Write each fraction in simplest form.
3) Which fraction above has the greatest value?
5/9 is bigger than 3/10 because 5/9 is about 0.55
and 3/10 0.3
Agenda
3
Agenda
OBJECTIVE Students will write real-world
quantities as ratios and explain their meaning.
Language Objective Students will define ratio
and will be introduced to ratio language
What does the word quantity mean?
1) Warm Up - Individual
2) Lucky Charms Launch Whole Class
3) Exploration - Partner
Hint How many ears do I have?
4) Summary - Individual
5) Practice Small Group
6) Assessment - Individual
A quantity is an amount of anything that we can
count. Like my ears!
4
Lucky Charms Launch
Turn and Talk

1. Have you ever had Lucky Charms cereal?
2. Are there more marshmallows or oat pieces in a
   box of Lucky Charms?
3. Predict how many marshmallows pieces are 1 box.
4. Predict how many oat pieces are in 1 box.

Hint
Agenda
5
Lucky Charms Launch
Turn and Talk

1. Have you ever had Lucky Charms cereal?
2. Are there more marshmallows or oat pieces in a
   box of Lucky Charms?
3. Predict how many marshmallows pieces are 1 box.
4. Predict how many oat pieces are in 1 box.

Hint There are almost 2,500 marshmallows and
oats altogether in 1 box.
Agenda
6
Lucky Charms Continued

? There are 287 marshmallow pieces and 2,583 Oat
Pieces in 1 box of Lucky Charms. We can write
this real-world situation as a ratio! A ratio is
a comparison of two different quantities. We can
write a ratio in 3 ways using
1) a fraction
2) the word, to
3) a colon
Agenda
7
Lucky Charms Continued

Write the ratio of marshmallows to oats in 3
ways.
Remember in 1 box 287 Marshmallows 2,583 Oats
Lets try together
 
1) A Fraction
2) The Word to
287 Marshmallows to 2,583 Oats
3) A Colon
287 Marshmallows 2,583 Oats
Agenda
8
Practice Work with a partner!
Write a ratio comparing of people to of
pizzas for each picture.
Picture 1
Picture 2
1 person 4 pizzas
4 people 1 pizza

• Talk to your partner
• How are the ratios above alike?
• Does the order matter when writing a ratio?

Yes! The situation changes if we change the
order of pizza people.!
Agenda
9
Explore

lions to birds
6 lions to 1 bird
lions birds
6 lions 1 bird
Partner Work Use the picture above to write a
ratio in 3 ways comparing the of lions to of
birds.
Agenda