Dziorny, Gail

LS 521 SP 02

March 14, 2002

 

Fraction Drop In

 

            Fractions are used in many ways in our everyday life.  Fractions are used in recipes, when building things, when measuring material and ribbon and when talking about portions of an hour (1/2 an hour or ¾ or an hour). Therefore, it is important to be able to add, subtract, multiply and divide fractions accurately.

 

            First, we want to look at adding fractions. There are two cases-like denominators and unlike denominators. Go to this web site and see the two cases and examples:

http://home.xnet.com/~fidler/triton/math/review/mat045/fraction/add/addition1.htm

 

            Next, let’s look at subtracting fractions.  Again, there are two cases.

http://home.xnet.com/~fidler/triton/math/review/mat045/fraction/subt/subt-1.htm

 

            Now it is time to review multiplication and division of fractions.

http://www.mathsisfun.com/fractions_multiplication.html

http://www.mathsisfun.com/fractions_division.html

 

You are now an expert at all the operations involving fractions.

You are asked to bake for the school bake sale and you decide to bake your famous Dalmatian Bars. However, 2 dozen will never be enough-they are very good and are eaten up quickly. Therefore, you need to make 4 dozen.

Go to the recipe and figure out the following:

http://cookie.allrecipes.com/AZ/DalmatnBrs.asp

Remember you are going to double the recipe:

  1. How many cups of unsalted butter will you need when you double the recipe?
  2. How many cups of white sugar will you need?
  3. You have 1 ¼ cups of chopped macadamia nuts. Is that enough for two batches of bars?
  4. How many more white chocolate chips will you need if you have 2 2/3 cups now?
  5. How many teaspoons of salt do you need?

Your bars were such a hit that next time you will triple the recipe:

  1. How much flour will be necessary when you triple the recipe?

 

 

After you have finished baking, you would like to make a quilt. You are teaching your friend to make one so you both go shopping to buy the material.  Your sister decides to join in the fun and so does your brother.  As you go to the store, you realize you need material for 4 quilts. Here is the pattern:

http://www.joann.com/content/projects/projectsDisplay.jhtml?articlePath=/content/projects/static/new/potpourri_quilt.jhtml

Remember that 4 quilts are going to be made:

  1. How many yards of each fabric (A-F) will be needed?
  2. How many yards of binding are needed?
  3. How many yards of backing are needed?