Unit Conversions and
Notes
Scale Models
Seemingly Random Review!
1)
−3
−6
=
4
2) Mrs. Cook can bake 60 cookies in
𝑥
40 minutes. How many cookies can
she bake in 60 minutes?
BIG IDEA #1 : We will use a __________________ in any word problem that compares
two things and asks for a missing value. In the real world, we can use proportions to convert
among different __________ or when creating scale __________ of places or objects .
BIG IDEA #2 : No matter how the problem is written, numbers that are directly
connected/compared go in the same ____________, and numbers with the same unit go
_________ to each other.
IMPORTANT : Change any fractions to ______________ BEFORE they go in the boxes!
Round money answers to _____ numbers after the decimal!
Example 1 : A map has a scale of 4 in. = 50 miles. With a ruler, you measured 3 inches
1
between Erie, Pennsylvania, and Virginia Beach. What is the actual distance between the two
cities on the map?
Example 2 : Kiran is going to run in a 10 km race, but wants to know how many miles he will
be running. He knows that 1 mi: 1.6 km. How far will he be running in miles?
You try!
1) Kylie is going on a trip to England and will be exchanging $250 for British
pounds. If the exchange rate is $1:£0.64, how many British pounds will
Kylie get?
1
2) A New York state map uses a scale of 1 2 cm. = 30 mi. On this map, the
1
distance from Binghamton to Schenectady is approximately 6 2 cm. How far
is the actual distance from Binghamton to Schenectady?
3) Allison learned that she is no longer supposed to use inches in 7th grade. If 1 in.:2.5 cm,
how many centimeters tall will her 5.5 in. picture of a dinosaur be?
4) On a poster, a calculator that is actually 7 cm wide is shown as
2
calculator is actually 155 cm long, how long is it on the poster.
1
2
m. wide. If the
5) Mrs. Cook is going to travel to Cooktopia, where the currency is called the Jojo. On her
return trip, she sees she has 350 Jojo left in her wallet. If $2:5 Jojo, how many dollars
would her Jojo be worth?
6) Nicole is baking cupcakes, and the recipe she’s using measures everything in grams, but
her scale only uses ounces. Her recipe calls for 84 grams of sugar to be added to her
recipe. She knows that 1 oz:28 g.