## Monday, October 19, 2009

### Estimating Decimals with Multiplucation

Susie and her family were on a long drive to California she was squished in the back in between her younger brother and older sister so to pass the time she did sudoku she finished her sudoku books. so she begged her parents to stop at a co-op so she could get another sudoku book. when they stopped she found the sudoku books she figured she needed 5 to get her to California. The sudoku books were 1.69 each (tax included) her younger brother estimated it would be 5 dollars her older sister said it would be 10 dollars what are they thinking and how are they estimating

Susie's younger brother estimated it would cost 5 dollars for the 5 sudoku books he was thinking 1.00x 5=5 he was just thinking about 1.00 not the 69 cents.

Susie's older sister estimated that it would cost 10 dollars for the sudoku books she was thinking 2.00x5=10 instead of doing 1.69 she rounded up to 2.00.

Are either of them right?

Susie has 9.00 in her pocket will that be enough?

Yes because it is only 8.45.

2.2x1.8=3960
were does the decimal go?
2x2=4
4 is closed to 3
3960 so therefore it goes in between 3 and 9 3.960

using the same method before i answered......

1)3.9x5.8= 22620
4x6= 24.
24 is closed to 22 so it will go in between the 22 and 6 22.620

2)2.57x0.45=118220
3x0.5= 1.5 (rounding up) so put the decimal point in between the ones 1.18220
11.82220 would be to far.

The Pronghorn sheep weighs 58 kg.
the Dall's sheep weighs 1.5 more than the Pronghorn.
how much more does the Dall's sheep weigh than the Pronghorn?
60x1= 60 kg
60x2= 120 kg
90 kg
50+8= 58
25+4= 29
=
87 kg

Here is a good math link for estimating decimals with multiplication
http://www.mathgoodies.com/lessons/more_on_decimals/multiply_by_whole.html

here is a video on multiplying decimals

1. good job summer! everything is great. but at the \$8.45. you should explain how it is \$8.45.

2. Hey, Nice post ! I also liked the font that you used. I also liked the link and the video.

3. good job summer,the video really helped me,but aren't you suppose to put a picture up too,but everything was done well

4. Great job, Summer! Although, you could of used some colors to highlight some of the important parts because it was a bit hard for me to read it and I think you should space it out a bit more, too.

5. Wow summer you even wrote down the story, good work, but you forgot the picture and I don't think we need to hear the whole story about how much Sudoku Puzzle would cost.It's not that important and when people read it they'll think your writing a novel.

6. You did a good job on the scribe post, Summer. Next time you should check the punctuation but everything else is fine.

7. Nice post Summer I really think you did a good job. Next time I think you should use capitals at the being of your sentences and use some color, but I like the font you used.

8. Summer I like the website because it had a lot of information. Next time I think you should put the homework on.

9. I really liked everything its detailed and the video and link is really helpful so nice job.

10. Nice post Summer! I liked the video. Next time check the punctuation and capitalization. I didn't get the part "Are either of them right". I don't think that's part of it. You forgot to put the part when the younger one underestimated and the older one overestimated.

11. Awesome job Summer! The video really helped me. But next time you should highlight the anwsers and explane them. But you did an awesome job!

12. Nice Job! The video and linked helped me but you could've check your capitalization. But good job!

13. Katerina couldn't get on her's so she asked me to post this for her.
Katerina says she thinks the video was very good and it really helped her. She also thought Summer should have posted a picture.

14. Terrific job, that was a good video you put up! Maybe you should of changed the color on some of the key words or answers, but besides that good job!

15. marysa:summer did put homework its at the top.
Summer: great work with the scribe. i really like the link that you used it explained alot. I think next time you might want to use a picture, but over all you did awsome work!!

16. oh marysa im so sorry nevermind i was looking at the wrong post.lol

17. Good job Summer!
But when you gave the link, you should have attached it to a word, so we could just click the word to get onto the site. But other than that I like the scribe!

18. Nice post Summer, but you could have explained the part on how you got the 8.45 to help some people know that it really is correct. Still great and good enough.

19. Good job Summer! I like the post that you gave us. It's packed with a lot of information. Also next time put up a picture.

20. Nice job Summer, thats some good explanation. But make sure to check ur punctuation

21. Good job Summer and I like your video but it would have been better if you had a picture. Also there were a few minor spelling mistakes but overall it was good.

22. Nice post Summer,you did a great job.But you could have put some highlights to the importan information and you could have explained how you got 8.5 so it would help people understand it more.You also forgot the picture for your post.Everything else seems to be a great job!

23. Really well done post Summer. You should have told why nine dollars was enough and how you got \$8.45.

24. Good job on the post Summer. You should check your punctuation first before posting and you should explain how the nine dollars are enough for the five sudoku books.

25. You did a great job. You could have done a better job explaining the car ride sudoku thing.

26. nice job Summer but you could put more picture but it was geat :)

27. great link ans video but next time you should remeber to put in a picture!

28. I like the post but show how you got that.

29. Good post Summer! but next time, you should add a picture to it and also how you need to explain the answer. Good job anyway.

30. Good job summer i like your post but you sould have put in a picture