## Tuesday, October 27, 2009

### Today's Notes

Why we estimate :

- to get close to the answer.
- is to make the problem easier.
- is to know what to expect from our calculations.

1.36 L of O.J. (Orange Juice) and there's 4 of you.

a) estimate how much you each get.

b) calculate how much you each get.

2.0 divided by 4 would equal 0.5 and that is 1/2 over estimating.
1.0 divided by 4 would equal 0.25 and that is 1/4 under estimating.

1.3 divided by 4 would equal 0.3 (0.36)
1.6 divided by 4 would equal 0.4 (0.46)

or you can use long division :

0.34
41.36
- 0

_____
1.3
- 12

_____
16
- 16
_____
0

So then the answer would be that each person would get 0.34 L of O.J.

Here's another question we had to try :

24.6
373.8
- 6

_____
13
- 12
_____

18

Here's a really good website where you can learn more on how to divide decimals:

And here's a video on how to divide decimals:

HOMEWORK :

5.4 divided by 0.6

Use numberline and estimating and long or short division.

Don't forget to do your homework!

1. Good Work Chelsea!
This helps me alot! I like how you change the font size and how you explained it!

2. Nice post Chelsea, the video and link helped me but you could've made the font bigger.

3. good job chelsea, you really explained how you did the question and thanks for the link it helped me.

4. Thanks chelsea everything was there and the questions were easy to read and i like how you changed the color of each important facts.

5. Nice post Chelsea, I thought that the link was really good but you forgot to put a picture.

6. Great job Chelsea, I really like how you changed some of the font colors! And the video was a great help. Good job!

7. Nice post chelsea it was great!I liked how you putan link and it was great!It really helped me.One thing you should have done is that you should have put a picture to represent the math questions but other then that you did great!

8. great post chelsea!
but were is your picture and the print is to small but otherwize awsome post

9. VERY VERY NICE POST ! I liked the way you put the homework at the end! But I think you should add a picture next time! Other than that, it was great !

10. Great post Chelsea!!! I like how your post was really organized. The video also helped me understand how to divide two decimal numbers better. Next time I think you should make the font a little bit bigger.

11. Great Post Chelsea, it would be even better if you added a picture. You should also make the print bigger next time so it would be easier to see and it would also stand out more, but other than that it was fairly decent post.

12. Well done Chelsea,I liked how you used colour to underline the importan parts in your post.But you could have done a few things to make your post even better!Like printing your words bigger because the letters are small and putting a picture in your post.Other then that it was a good post!

13. This was a good post Chelsea. I needed this because i forgot to write down the homework. I also really liked the font that you used.

14. Nice post, Chelsea. I like how you changed the colour on a few words so they stand out. It would be nice if you used a bigger font.

15. Nice post chelsea the video was good and it helped me a lot but i think you could have improved it by making the font bigger.

16. Good job Chelsea! I liked your post. Next time you should put a picture in it.

17. Neat post Chelsea! I really understood your post. Next time, try adding a picture. Other than that, great job!

18. Nice post Chelsea.0 I really liked the video! Next time, try to add a picture.

19. Awesome post Chelsea! The font was really easy to read and how you explained it was very clear. But next time you should add a picture.

20. I like your post Chelsea! I like the video but next time you should make your font bigger.

21. Awsome post chelsea, it really explains alot.It explains to me what i have missed in class because i was sick. this is really helping me. only one thing, you might want to add a picture next time but other than that great job.

22. Great job that was a good video maybe next time add a picture

23. Great job on your post Chelsea! I liked how you organized your post, but next time try and add pictures. Other than that it was a great post.

24. Chelsea your post was very well done! Your post was well organized and looked attentive. Next time try to add a picture?

25. Great job. I think next time you shoud make the lettering bigger.

26. great job on the scribe. next time make lettering bigger and put a picture

27. I like the post but the font is to small.
Good job!

28. Good job Chelsea I think it would look better with some pictures.

29. Nice. Should've made the font larger.

30. I love the post Chelsea, but where is the pictures?