alex needs 1/2 a cup, he only has 1/8 how much more does need

Question

 Alex is making cookies he needs to measure 1/2 a cup of flour.  However he only has 1/8 measuring cup.  What will he need to do in order to make sure he has the correct amount of flour

Answer 1

1/2 ÷ 1/8 = 1/2 X 8/1 = 4 1/8 cups  

Answer 2

Student,

 

You have 2 different questions in the problem title and in the problem description.

 

Question in title:

 

Alex needs the difference of 1/2 cup and 1/8 cup, which is 

 

(1/2 - 1/8) cup = (4/8 - 1/8) cup = 3/8 cup

 

Question in description:

 

Alex needs to find how many times 1/8 cup fits into 1/2 cup, and then measure 1/8 cup that many times.

 

(1/2 cup)/(1/8 cup) = 4

 

Alex needs to measure 1/8 cup 4 times to get the same amount as 1/2 cup.