Fraction Story

It's time to write a fraction story. Here are the steps you should take:

  1. Form a group of 3.
  2. Using popplet, brainstorm ways you use fractions in everyday life.
  3. Find a word problem from the book that covers fractions. Choose a problem that is not one of the ways you brainstormed. (HINT: chapter 5 covers fractions)
  4. Write the problem in your popplet and determine which operation you would use to solve it.


You are going to write a fraction story. Below is an example of a fraction story. Read the story, then list all of the math problems you find in it.


A Fraction Story


Tristan wants to make a batch of his favorite butter rolls for Thanksgiving. He needs to make 12 rolls but his recipe makes 60 rolls! He knows he needs to use fewer ingredients than his recipe calls for so that he does not have too many rolls. So he does a little division. He knows he wants 12 rolls out of 60 and 12/60 (twelve divided by sixty) is 1/5 (one fifth). Tristan needs to make 1/5 (one fifth) of what the recipe actually calls for.
The recipe calls for 6 ¼ (six and one fourths) cups of flour. If Tristan wants 1/5 of this amount he needs to multiply it by 1/5 (one fifth). First, however, he needs to convert 6 ¼ to an improper fraction. 6 ¼ (six and one fourths) cups is the same as (6*4 + 1)/4 (six times four plus one all divided by four)or 25/4 (twenty-five fourths) cups. 1/5 (one fifth) of that is 25/4 * 1/5 = 5/4 (twenty-five fourths times one fifth equals five fourths) cups. Converting this back to a mixed number, Tristan needs 1 ¼ (one and one fourth) cups of flour to make 12 rolls.
The recipe also calls for 2 ½ (two and one half) sticks of butter. He knows that one stick of butter is ½ (one half) cup. This means that 2 sticks is 1 cup of butter and 1/5 (one fifth) of this is 1*1/5 = 1/5 (one times one fifth equals one fifth) cups of butter. Another half stick of butter is going to be 1/2*1/2 = ¼ (one half times one half equals one fourth) cups of butter and 1/5 (one fifth) of this is ¼*1/5 = 1/20 (one fourth times one fifth equals one twentieth) cups. This means Tristan needs the sum of 1/20 (one twentieth) and 1/5 (one fifth) cups of butter. So he needs 1/20 + 1/5 = 1/20 + 4/20 = 5/20 = ¼ (one twentieth plus one fifth equals one twentieth plus four twentieths equals five twentieths equals one fourth) cups of butter.




Now it is your turn. Pick a topic from your popplet. Write a story about your topic using at least two different operations with fractions. Your story can be created on your iPads using Pages.
Comments