Posted by Marissa on .
What steps do we use to change 11/2 cups in half?

6th grade 
Writeacher,
3/2 divided by 2 = 3/2 * 1/2 = ??

6th grade 
Ms. Sue,
Change 1 1/2 to an improper fraction.
Multiply.
(1/2) * (3/2) = 3/4 
6th grade 
Marissa,
I was told that when dividing a mixed number you write the reciprocal of the second number and then multiply and that will change the answer.

6th grade 
Ms. Sue,
You only use the reciprocal when the original problem is a division problem.
Your problem is a straight multiplication problem. 
6th grade 
Marissa,
Isn't this a division problem? I have to divide 11/2 into two parts.

6th grade 
Ms. Sue,
It's the same thing.
(3/2) / 2 = (3/2) * (1/2)
The simpler way is to remember that "of" in a math problem means to multiply.
(3/2) * (1/2) = 3/4 
6th grade 
Marissa,
Thank you very much for your help. I had the same answer. I'm trying to explain the reciprocal to my daughter, she is worried that her teacher will say the answer is wrong.

6th grade 
Ms. Sue,
You're very welcome.