Finding Volume with Fractional Edges

Volume with Fractional Edge Lengths

How can you determine the volume of a rectangular prism with fractional edge lengths?

Volume = L x W x H

L =  $1\ \frac{1}{2}$    W =   $1\ \frac{1}{2}$    H =  $1\ \frac{1}{2}$  

Volume =  $1\ \frac{1}{2}\times1\ \frac{1}{2}\times1\ \frac{1}{2}$  


1. Convert Mixed Numbers into improper fractions.   $1\ \frac{1}{2}\ =\ \frac{3}{2}$  

Volume = L x W x H

2. Multiply the improper fractions.

   $\frac{3}{2}\times\frac{3}{2}\times\frac{3}{2}=\frac{27}{8}$ 

Volume = L x W x H

3. Simplify the improper fraction. 

   $\frac{27}{8}=27\div8=3\ \frac{3}{8}$ 

Multiple Choice

Find the volume of this rectangular prism.

• 233.1 m³

• 66.6 m³

• 22.8 m³

• 15.75 m³

Multiple Choice

Find the volume of this rectangular prism.

• 3 3/4 in³

• 7 1/2 in³

• 11 1/4 in³

• 7 in³

Multiple Choice

Find the volume of this rectangular prism.

• 9 yd³

• 8 2/3 yd³

• 3 1/3 yd³

• 17 7/9 yd³

Multiple Choice

Find the volume of this rectangular prism.

• 7.8 m³

• 31.2 m³

• 11.7 m³

• 26 m³

Multiple Choice

Find the volume of this rectangular prism.

• 0.63 m³

• 2.16 m³

• 1.512 m³

• 4 m³

Poll

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