Sunday, December 17, 2006

Dan's Percent Growing Post

1.What is a good definition of percent? You should use words symbols, pictures and numerical examples in your definition. (suggestion gliffy is an excellent tool for adding detail to your definition.)
A percentage is out of 100. It is out of 100 because 100 is an easy number to work with. It is represented by %. It can be converted into fractions, decimals, or ratios,(e.g. 45%=45/100=0.45=45:55) It is part of a whole unless you have 100% or more.

2.
How are three fifths (3/5), 3:2, 60% and 0.6 all the same? Use pictures and words to show your answer.
Start with 60%. 60% is equal to 60/100, (60 over 100) Now that you have 60/100, you can divide 60 by 100 to get a decimal, (60/100 = 0.6) 60/100 can be reduced to 3/5. Now go back to the fraction. To get the ratio, subtract the numerator from the denominator, (100 - 60 = 40) your ratio is 60:40. 60:40 is equal to 3:2. What you have compared to what you need. They are all equivalents

3.
Show 3 different ways to find 35% of 80. (bubbleshare is an excellent tool to animate the many different ways of finding these answer).
100/100=1, 80/100=0.8 0.8x35=28 28/80=35/100
35/2=17.5 17.5x0.8=14 14x2=28

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35/100 is equal to 28 over 80

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4.Find a link to blogs that deal with percentages. Leave a comment behind and add the link with a review (What the post was talking about....yes you have to read the post and why others should read the post) Hint In the side bar there are links to other schools. Three of them have done work on percentages!
I went to http://linden8z.blogspot.com/
I commented on the fourth one from the top calle Percent... and don't you forget it.
It was all about converting numbers less than 100 to pecents. I treally made a lot of sense. If anyone is having trouble with converting, I say look at that post. Plus it has very good pics to elp you out.

5.
The principal announced that 50% of the children in Ms. Stanzi's class met their reading goal for the month and that 55% of the children in Ms Lowrey's class met their reading goal for the month. Ms Stanzi said that a greater number of her students met their reading goal. Could Ms Stanzi be correct? Why or Why not.
Ms. Stanzi would be right if her class had more than Ms. Lowrey's. Her class had only half(50%) of the the kids reach their goals. While Ms. Lowrey's class had 55%.
For example. If Ms. Stanzi had 30 children in her class and Ms. Lowrey had only 25, Ms. Stanzi would have 15 of her students who met their goals(30/2=15) Ms. Lowrey would only have thirteen or fourteen(25/100=0.25x55=13.75)

6.
Use a hundred grid (unit square) to illustrate the following questions. Once you have explained and illustrated what the question means solve it.
a) 16 is 40% of what number? This question means that 16 is 40% of an unknown number.
40/40=1
16/40=0.4
0.4x100=40
16/40=40/100
b) What is 120% of 30?
30/100=0.3x120=36
36/30=120/100

It's over!

Mr H. I have left comments on both Levon's and Bruno's growing posts.

2 comments:

KriS™ said...

Setup
5/5
Comments:good setup
Question 1
2/10
Comments:Your definition is detailed but can be made even better if you add an image.
Question 2
4/10
Comments:again, an image would of made your answer even better.
Question 3
2/10
Comments:Good effort, try to space out the three ways of finding 35% of 80
Question 4
3/5
Comments:Everything else is there but you forgot to leave a link to your post
Question 5
6/10
Comments:Good effort, but there is no image
Question 6
11/15

Overall Mark
33/65
Overall Comment for the Growing Post:Your answers are clear but there are some things missing

Dan the Man said...

Setup
5/5
Comments:I met all the requirements.
Question 1
3/10
Comments:I could have done a lot more.
Question 2
2/10
CommentsI didn't try very hard
Question 3
4/10
Comments I should've used something other than word to make a diagram.
Question 4
4/5
Comments I met all the requirements but it wasn't as good as it could be.
Question 5
5/10
Question 6
8/15

Overall Mark
31/65
Overall Comment for the Growing Post: I should've tried harder on everything