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Sunday, November 25, 2012

Kathleen's Scribepost

Questions: 10, 11, 12

Page 228

*The ones that are in RED are WHOLE NUMBERS
*Reciprocal-  is the fraction that when multiplied creates a product of 1

10.) Divide

a.) 1 1/12 divided by 2 1/2

You need to turn the mixed numbers into an improper fraction. 1 and 1/2 becomes 13/12 and 2 and 1/2 becomes 5/2. Since you have to do the reciprocal on the denominator, you multiply 13/12 by 2/5 on the top (numerator). Then simplify your answer if needed.


b.) 8/11 divided by 4/5


 Do the reciprocal on the denominator then after you do that step, you put the reciprocal on the denominator and multipy those. Simplify if it is needed, in this case, I simplified it by 4.



c.) 1 3/8 divided by 2 3/4





Do the reciprocal on the denominator then after you do that step, you put the reciprocal on the denominator and multipy those. Simplify if it is needed, in this case, I simplified it by 11 then 2.


11.) In a comedy review, each performer has a 1/4-h slot. How many performers are there in a 2-h show?

My tip for words problems like this is whatever the second number is, that is what's going to be the denominator. I'm not 100% sure it will work all the time, but this is what I've been using for these kind of word problems.
2 divided by 1/4
How many times does 1/4 go into 2?

*Since 2 is a whole number, make it into a fraction by using 1 as a denominator. So it becomes 2 over 1.


12.) It takes 2 1/2 scoops of flour to make one cake. How many cakes do 15 scoops of flour make?

*My tip for words problems like this is whatever the second number is, that is what's going to be the denominator. I'm not 100% sure it will work all the time, but this is what I've been using for these kind of word problems.


If you don't get my explanation, here's a video you could watch to understnad dividing fractions more.

And the video below explains how to do the reciprocal for divind fractions.




My Test Corrections

In computer terminology, a bit is 1/8 of a byte. How many bits equal 16 bytes?

16 divided by 1/8




Tamar had 1/2 of an apple pie in her refrigerator. She ate 1/4 of this piece of pie. What fraction of a whole pie did she eat?

1/2 x 1/4 = 1/8

5/6 x 1/2

What is 1/2 of 5/6



1/4 divided by 1/3




2 comments:

  1. Good job you put effort into this and it shows, you did great at the pictures and the videoS and it helped. Good job.

    ReplyDelete
  2. Good job Kathleen! I like how you explained how you got your answers. I also liked how you added 2 videos to help us understand better.

    ReplyDelete

 

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