Solving Proportions
(Butterfly Method)
(Butterfly Method)
2/x + 8/10
x=2.5
If you can buy one can of pineapple chunks for $2 then how many can you buy with $10?
5
A 6 ft tall tent standing next to a cardboard box casts a 9 ft shadow. If the cardboard box casts a shadow that is 6 ft long then how tall is it?
4 feet
3 ∶ 7 = ___ ∶ 49
21
if the answer is higher than 0 it's a __
enlargement
x/4 + 3/5
x=2.4
One jar of jelly beans costs $2. How many jars can you buy for $4?
2
A telephone booth that is 8 ft tall casts a shadow that is 4 ft long. Find the height of a lawn ornament that casts a 2 ft shadow.
4 feet
1 ∶ 2 = 20 ∶ ___
40
if the answer is lower than 0 it's a __
reduction
5/x + 6/7
x=5.83
One cantaloupe costs $2. How many cantaloupes can you buy for $6?
3
A map has a scale of 3 cm : 18 km. If Riverside and Smithville are 54 km apart then they are how far apart on the map?
9 centimeters
1 ∶ 5 = ___ ∶ 50
10
on a number line, anything below 0 is a ___ number
negative
4/x + 8/9
x=4.5
One package of blueberries costs $3. How many packages of blueberries can you buy for $9?
3
Find the distance between Riverside and Milton if they are 12 cm apart on a map with a scale of 4 cm : 21 km.
63 km
7 ∶ 9 = 14 ∶ ___
18
on a number line, anything in front of 0 is a ___ number
positive
2/x + 5/9
x=3.6
Shawna reduced the size of a rectangle to a height of 2 in. What is the new width if it was originally 24 in wide and 12 in tall?
4 inches
Georgetown and Franklin are 9.7 in apart on a map that has a scale of 1.1 in : 15 mi. How far apart are the real cities?
5 ∶ 3 = 45 ∶ ___
27
what's a variable?
a thing showed to represent an unknown amount