Lesson 1
Introducing Ratios and Ratio Language
Let’s describe two quantities at the same time.
Problem 1
In a fruit basket there are 9 bananas, 4 apples, and 3 plums.
 The ratio of bananas to apples is ________ : ________.
 The ratio of plums to apples is ________ to ________.
 For every ________ apples, there are ________ plums.

For every 3 bananas there is one ________.
Problem 2
Complete the sentences to describe this picture.
 The ratio of dogs to cats is ________.
 For every ________ dogs, there are ________ cats.
Problem 3
Write two different sentences that use ratios to describe the number of eyes and legs in this picture.
Problem 4
Choose an appropriate unit of measurement for each quantity.
 area of a rectangle
 volume of a prism
 side of a square
 area of a square
 volume of a cube
 cm
 cm^{3}
 cm^{2}
Problem 5
Find the volume and surface area of each prism.

Prism A: 3 cm by 3 cm by 3 cm

Prism B: 5 cm by 5 cm by 1 cm

Compare the volumes of the prisms and then their surface areas. Does the prism with the greater volume also have the greater surface area?
Problem 6
Which figure is a triangular prism? Select all that apply.
A:
A
B:
B
C:
C
D:
D
E:
(From Grade6, Unit 1, Lesson 13.)
E