## Tuesday, January 26, 2010

### scribepost for January 26, 2010

Today in class, our assignment was to fill in section 4.3 in our fold ables. The title was, 'Percent of a Number'. Here is what we had to put into our fold ables:
First we had to add notes from the key ideas in page 141.

- You can use mental math strategies such as halving, doubling, and dividing by 10 to find the percents of some numbers.
- To calculate the percent of a number, write the percent as a decimal and then multiply by the number.
e.g. 12 1/2 % of 150 = 0.125x50 = 6.25

After that, in the same box, we had to do the 'Communicate the Ideas' #'s 1 and 2.

1. a) 300% of 40 -

300% of 40 is 120.

b) 0.5% of 120 -
100%/100=1%
120/100=1.2

1%/2=0.5%
1.2/2=0.6
/= divided by
0.5% of 120 is o.6

c) 10 1/2 % of 80 -
100%/10=10%
80/10=8
10%/10=1%
1%/2=0.5%
8/10=0.8
0.8/2=0.4
10%+0.5=10 1/2 %
8+0.4=8.4
10 1/2 % of 80 is 8.4

2. 6% of 120 -

FIRST WAY:
100%/100 = 1%
120/100 = 1.2

1% x 6 = 6%

1.2 x 6 = 7.2

6% of 120 is 7.2

SECOND WAY:

I got 16.6 by, dividing 100 by 6.
To be honest, i had to use a calculator for dividing 120 by 16.6 to make sure 7.2 was right.

Lastly, we had to show a way to solve these percents:

10% - divide 100 by 10.
5% - divide 100 by 20.
25% - divide 100 by 4.
1% - divide 100 by 100.
0.5% -
divide 100 by 100, then by 2.

I apologize if it's late, I forgot about it.
THANKS FOR READING, PLEASE COMMENT ! :)

Jemineth873 said...

Good job allysa, your explanations were accurate and understable. I thought your pictures were well done with the "explanations" and it was precise. You talked about everything done that day, with every bit information needed to support that, so good job yo (:

Ralph817 said...

Good Job! The explaination was clear and understandable. Some of the pictures from your notebook were a little bit hard to read but the explanation was great! Good Job!

april817 said...

Great job Allysa! Really good work and explanations, although your first two pictures are a little hard to see. Other than that, everything was well done. :)

noeLLeCUV817 said...

Nice scribepost allysa, that post was good, i liked how you used Mr.harbeck's idea by taking a picture of your foldable and how you still explained everything in it. Good job.

Darlene8-17 said...

Good job Alyssa ! Your scribe's understandable but the first 2 pictures were hard to see. I like your colorful scribe by the way. x]