Scribe Post for October 26, 2009

Monday, October 26, 2009
Hello there 9-05! (: First things first, I would like to say HAPPY BIRTHDAY JOSEPH! Anyways, the first thing we did in class today was we went over questions that we did not understand.

One of the questions that was asked was, how can you put -1 1/2 into an improper fraction when there is a negative integer?
Well, as you can see, I put the negative signs red. The reason why I did that is because first, we solve the question without the signs then we add it on afterwards. The first thing we do is we add the whole number (1) to the denominator (2) and that equals to 2. Then, we add the 2 to the numerator (2) which equals to three. Since we are making this into a proper fraction, we add the denominator. Which the answer equals to 3/2. Now that we have solved everything, all we have to do is add the negative signs.

After that, Mr. B asked us to change 0.16 (16 is repeating) into a fraction. The answer we got was 16/99. Do you know why? Here, I will show you.

Do you get it? Well, to find the fraction of it you have to times it by 100x. We do that because a fraction is out of a hundred, and the "x" stands for the number we are trying to find. The reason why we use the number 16.16 is because we have to move units down because of the 100.
(I'm sorry if you dont understand, I'm bad at explaining.. but I will try my best to help you)Then 100x-x = 99x. You get the the answer 99 because when you have 100 bananas for example and you take one away there are 99 bananas. The "x" does not change anything, the "x" represents as 1. Then the 99's cancel eachother out and then it becomes x=16/99. If you want to make sure it is correct, you can check it with a calculator to see if the answer is really 0.16 repeating.
Here are other examples of what we did in class:
0.23 (repeating on 23)
0.16 (repeating on only the 6)
You are probably wondering how to do this right?
Some of the possible answers are: 16.5/99, 6/9. 1/6. 16/9.
Which one is the correct answer?
Let's see. 0.016 (16 is repeating)
What is the answer?
16/990 or 16/999?
Homework:
Find the Fractional Expression for these numbers.
0.2 (repeating on the 2)
0.43 (repeating on 43)
0.172 (repeating on 72)
How to find the answer to:
3/5 - 3/8=?
AND
of course Math Journal .

AND... just because we are "THE CLASS", here is a video if you are still having trouble (:
oops. nevermind. I can't seem to find anything... because when I looked for a video, it says instead of 100x, its 10x.. I don't really understand why.. but I will ask Mr. B tomorrow (:
Well, I hope you guys enjoyed reading my post.. I am sincerely sorry for not posting the part about the chess problem. I don't understand it and plus, I have to study for french. So, I'm very very sorry. I appreciate your time looking at my work and comment if you'd like (: OH! I almost forgot, the next scribe is...... ABBY ! (:

11 comments:

Abby905 said...

Hey Melissa! Good job on the scribe! I think you used a great amount of pictures and color! I also like the fact that you tried to look for a video! I like the banana example too! Haha. And guess what? I'M FIRST TO COMMENT! COOL~! Anyways, keep up the good work Melissa!

liem905 said...

Congratz on first too comment!, downside your scribe haha. Melissa excellent scribe very nice use of pictures, and colouring!

Superb Work! Next time ask backe about the chess problem, but now I got to do my math homework!

kara 9-05 said...

Great job Melissa! You made sure to explain EVERYTHING that we did in class, which was good. One tiny thing that I would suggest is to maybe check some of your grammar. But other then that, nice work!

Dean 9-05 said...

nice melissa, very detailed and informative! nice use of pictures and such. thanks for the homework check, which is what all of our scribes should include, and yeah. keep up the good work, all of us!

905, we really are turning into "the class"
haha, mr. backe's using my word now :D

JosephD 9-05 said...

Good Job Melissa! I like how you made your pictures nice and big and easy to understand. You forgot to talk about the chess problem, but it's all good. BTW, THANKS FOR THE 2nd SENTENCE! (:

Karen9-05 said...

GREAT JOB melissa ! i think you explained everything properly well and it's very detailed- that's a very good thing. i like your use of color (: very eye catching. and i like how you used pics too. as what everyone said you EXPLAINED EVERYTHING. :D thanks for posting the hw too and for giving more details about what happened in class because i was really confused today. thank you again and keep up the good work (:

magicman8-41 said...

heey melissa.isnt the last question for homework reapeating on 172 not just 72? because were supposed to find a 3 digit one right? Great Job though!

Lissa 9-05 said...

AW, thanks for the comments you guys! Thanks Kara, I will check on those grammar mistakes. and .. I'm not sure bout the 72 thing.. I might have wrote it down in my paper wrong..

linda 9-05 said...

Nice work Melissa! Your post really helped me to understand the repeated decimal work. The colour patterns you chose complimented one another quite nicely :P A few things you could try adding are links if you can't find a video, and checking your punctuation. Fantastic job! Keep it up!

Zerlina905 said...

Great job Melissa! I like the pictures and I also like how you explained everything very clearly. I think you should check your punctuation too. Excellent work!

angela905 said...

Great scribe Melissa! Good pictures, and very detailed information! I agree with Zerlina, always check for puntuation, and grammar. But, overall you did good! :D

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