Finding Volume

Finding Volume using fractional cubes

Lets look at the volume of prisms that have fractional edge lengths.

​Lesson Objectives

I can solve volume problems that involve fractions.

The amount of space in a 3-D object.

​Example: the amount of space that the popcorn takes up inside the popcorn box.​

​Volume

​Finding Volume using cubes

Method 1

Determine the number of cubes that fit across the length, width and height of the prism.

Watch as I show you an example.

Finding volume using cubes

Method 2

Find the volume of the rectangular prism and the volume of the cube.

Then divide the volume of the rectangular prism by the volume of each cube.

Watch as I show you an example.

Multiple Choice

How many boxes can Geraldo keep in the bin?

• 3 8/9 boxes

• 105 boxes

• 5 boxes

• 121 boxes

Multiple Choice

Maria wants to fill the box with building cubes that have edge lengths of 1/2 ft. How many cubes can she fit in the box?

• 1,200 cubes

• 54 cubes

• 1,344 cubes

• 67 cubes