Download Ratio Part to Total

What does it mean when you see a ratio
like “Grandma knits 1 pink sweater for
every 5 sweaters that she knits”?
In this lesson you will learn to
visualize a part-to-total ratio using
pictures.
A Common
Let’s
Review Mistake
Not realizing that the pink sweater is part of 5
total sweaters
Example: 1 pink sweater for every 5 sweaters she
knits
A Common
Let’s
Review Mistake
Thinking that a ratio describes just one
situation
Example: 1 pink sweater for every 5 sweaters she
knits
CoreReview
Lesson
Let’s
Ratios show how 2 (or more) quantities are
related.
CoreReview
Lesson
Let’s
For example: 1 pink sweater for every 5
sweaters she knits
CoreReview
Lesson
Let’s
The ratio of pink sweaters to total sweaters is
1 to 5
1:5
1
5
In this lesson you have learned to
visualize a part-to-total ratio using
pictures.
Guided
Practice
Let’s
Review
At a pet store, the ratio of puppies to total pets is 3
to 4. Draw two different pictures of this ratio.
Extension
Let’s
ReviewActivities
In a bag of M&Ms the ratio of red to blue to total
M&Ms is 1:2:10. Draw two different pictures of this
ratio.
Extension
Let’s
ReviewActivities
Sweetie’s Cupcake Store makes 5 chocolate
cupcakes for every 12 cupcakes they bake.
Melanie says that this ratio is the same as saying
“7 not-chocolate cupcakes for every 12 cupcakes
they bake”.
Do you agree? Why?
Extension
Let’s
ReviewActivities
Grandma also knits hats. She makes 2 striped
hats for every 3 hats that she knits. Draw two
different pictures of this ratio.
Quick
Quiz
Let’s
Review
In a class, 1 student wears glasses for every
4 students. Draw two different pictures of
this ratio.
Draw two different pictures of this ratio: 3
out of every 10 markers are blue.