Warm Ups
Write your answers in
your Warm Up book and
be prepared to share!
Warm Up #1
• Alyssa’s extended family is staying at the lake house
this weekend for a family reunion. She is in charge
of making pancakes for the entire group. The
pancake mix requires 2 cups of flour for every 10
pancakes.
• Write a ratio to show the relationship between the
number of cups of flour and the number of
pancakes made.
• Discuss with your partner what we might mean by
“the value of the ratio.”
Use the value of the ratio to fill in the following two
“multiplicative comparison” statements.
• The number of pancakes made is ________ times the
amount of cups of flour needed.
• The amount of cups of flour needed is ________ of
the number of pancakes made.
• If Alyssa has to make 70 pancakes, how many cups
of flour will she have to use? Show how you got this
answer.
Warm Up #2: A peanut butter company decides to try out a
new version of its peanut butter that is extra crunchy, using
twice the number of peanut chunks as normal. The company
tries a sampling of its new product at grocery stores and
finds that 5 out of every 9 customers prefer the new extra
crunchy version compared to the old version.
• The ratio (as a fraction) of number preferring new extra
crunchy to total number surveyed is _________.
• The ratio (as a fraction) of number preferring regular
crunchy to the total number surveyed is _________.
• The ratio of number preferring regular crunchy to
number preferring new extra crunchy is _________.
• The ratio of number preferring new extra crunchy to
number preferring regular crunchy is _________.
Let’s use the value of each ratio to make comparisons
for each of the ratios we described.
• The number preferring new extra crunchy is _________ of
the total number surveyed.
• The number preferring regular crunchy is _________ of
the total number surveyed.
• The number preferring regular crunchy is _________ of
those preferring new extra crunchy.
• The number preferring new extra crunchy is _________ of
those preferring regular crunchy.
• If the company decides to produce 2,000
containers of regular crunchy peanut butter,
how many containers of new extra crunchy
peanut butter would it produce?
• If the company decides to produce 10,000
containers of new extra crunchy peanut
butter, how many containers of regular
crunchy peanut butter would it produce?
Lesson
• To make Paper Mache, the art teacher mixes water
and flour. For every two cups of water, she needs
to mix in three cups of flour to make the paste.
• Find equivalent ratios for the ratio relationship 2
cups of water to 3 cups of flour. Represent the
equivalent ratios in a table.
What happens if you add to a number in column one. Do you
add the same amount to column 2?
Each pair of numbers in a ratio table is equivalent to the
same ratio.
The following tables show how many words three girls can text in a
given amount of time.
Michaela
50 words per (1) minute
Jenna
45 words per (1) minute
Maria
40 words per (1) minute
What strategy would you use to compare the speeds of the 3 girls?
Can we find how many words each can type in ONE minute?
What do these three have in common when written as a ratio?
2nd # is ONE
• Share some examples of where you have seen or
heard of “something” per “1 unit”
Miles per gallon
Meters per second
Price per kilo
Students per teacher
Classes per day
Class/homework
• Go to my blog and download the worksheet
“problem set 2”
• Do all of your work in your orange notebooks.
• Make sure to make a table if the instructions say to!