A store is selling blank CDs in packages of 25 for $5. Wrire and solve a multiplication equation to find the cost of one blank CD.

Question

A store is selling blank CDs in packages of 25 for $5. Write and solve a multiplication equation to find the cost of one blank CD. 

Answer 1

It seems that Philip may have misread the problem.  Although his structure is correct, he is doing the problem of selling 5 CD's for $25 where the question asked is 25 CD's for $5.

 

Therefore, following Philip's model:

 

Let C=the cost of one CD

We know that 25 CD's cost $5. If one CD costs C, then 25 CD's cost 25C;

25C = $5

 

To solve for C, we must divide both sides of the equation by 25 resulting in the following expression:

 

C = $5/25 = ?

Answer 2

Let C = the cost of one CD

 

We know that 5 CDs cost $25.  If one CD costs C, then 5 CDs costs 5C; that is:

 

5C = $25

 

Divide both sides of the above equation by 5:

 

C = $25/5 = ?