Sunday, December 17, 2006

Mark's Percentage Growing Post

Question 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.)

http://www.gliffy.com/publish/1125974/L

Question 2

How are three fifths (3/5), 3:2, 60% and 0.6 all the same? Use picture and words to show your answer.

3/5: 3÷5=0.6, 0.6x100=60, 5-3=2 (denominator - numerator) numerator = 1st part and denominator - numerator answer = 2nd part = 3:2

They are all the same because the answers are all equivalent.

Question 3

Show 3 different ways to find 35% of 80. (bubbleshare is an excellent tool to animate the many different of finding these answers.)

1. 100÷100=1
80÷100=0.8
0.8 = 1%
0.8x35=28%

2. 100÷2=50
80÷2=40
50%=40
80÷100=0.8
0.8=1%
0.8x15=12
50%=40
15%=12
______
35%=28%

3. (Calculator use)
80÷35 and press the %(percent) button = 28

Question 4

Find a link to blogs that deal with percentages. Leave a comment behind and add the link with the review (What the post was talking about....yes you have to the post and why other should read the post) Hint in the side bar there are links to other schools. Three of them have done work on percentages!

http://linden8z.blogspot.com/ My comment on this blog is that they are doing what were doing or just starting.

Question 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 met their reading goal for the month. Ms. Stanzi said that a great number of her students met their reading goal. Could Ms. Stanzi be correct? Why or why not?

Ms. Stanzi could be right if she had more children in her class then Ms. Lowrey does.

For example:

Ms. Stanzi's class has 20 kids and Ms. Lowrey's class had 16 kids. Ms. Stanzi's class would have 10 kids that met their reading goal. (20÷2=10)

Ms. Lowrey's has only 8 or 9 kids that met their reading goal. (16÷100=0.16, 0.16x55=8.8)

Question 6

Use a hundred grid (unit square) to illustrate the following question. Once you have explained and illustrated what the means solve it.

a) 16 is 40% of what number?

40÷40=1
16÷40=0.4
0.4x100=40
16/40=40/100

b) What is 120% of 30?

30÷100=0.3
0.3x120=36
36/30=120/100

I marked Michael from 8-41 and Lenard from 8-17

\$\$\$\$ said...

Setup
5/5
Question 1
4/10
Question 2
7/10
Comments You showed how they are all equal to 3/5.
Question 3
8/10
Question 4
5/5
Question 5
8/10
Question 6
10/15
Overall Mark
47/65
Overall Comment for the Growing Post
GOOD JOB

Mark I said...

Setup
4/5
Question 1
10/10
Question 2
7/10
Question 3
7/10