Unit 1:
Proportional Reasoning
O EQ: What kind of questions can
be answered using proportional
reasoning?
Set up a table in your notes
and complete it:
6 melons cost $12. 3 watermelons
How much does
cost $15. How
one melon cost?
much does one
watermelon cost?
3 apples cost $.99.
How much does
one apple cost?
Answer:
Answer:
Answer:
Show work
Show work
Show work
Check Your Answers with
the class:
6 melons cost $12. 3 watermelons
How much does
cost $15. How
one melon cost?
much does one
watermelon cost?
3 apples cost $.99.
How much does
one apple cost?
Answer:
$2 per melon
Answer:
$5 per watermelon
Answer:
$0.33 per apple
Various methods
Various methods
Various methods
Look at the last row, what is
that called?
6 melons cost $12. 3 watermelons
How much does
cost $15. How
one melon cost?
much does one
watermelon cost?
3 apples cost $.99.
How much does
one apple cost?
Answer:
$2 per melon
Answer:
$5 per watermelon
Answer:
$0.33 per apple
$𝟐
𝟏 𝒎𝒆𝒍𝒐𝒏
$𝟓
𝟏 𝒘𝒂𝒕𝒆𝒓𝒎𝒆𝒍𝒐𝒏
$𝟎. 𝟑𝟑
𝟏 𝒂𝒑𝒑𝒍𝒆
Unit Rate
O Ratio in which the second
term or denominator is, 1.
Using
Pictures to
Find Unit
Rates
How are you going to
draw a picture to find
the unit rate?
O At Ralph’s fruit stand you can buy
3 apples for $0.90. How much
will you pay for 1 apple?
What did you draw?
Draw a Picture to
Find the Unit Rate
O At Ralph’s fruit stand you can buy
4 oranges for $0.90. How much
will you pay for 1 orange?
What did you draw?
Draw a Picture to
Find the Unit Rate
O At a bank in England 3 U.S.
dollars can be exchanged for 2
British pounds. How many
British pounds will you receive for
1 U.S. dollar?
What did you draw?
Draw a Picture to
Find the Unit Rate
O At a bank in England 3 U.S.
dollars can be exchanged for 2
British pounds. How many U.S.
dollars will you receive for 1
British pound?
What did you draw?
In your Learning Log
Spiral, answer the
following question in a
complete sentence:
How are unit rates represented in the
real world?