Wednesday, December 2, 2009

Just-in time for the alien story

An alien has landed from another planet. He is a scout for his planet. They plan on taking over the earth.

1) David can saw a log into three pieces in 7 min. If he continues sawing at a constant rate, how long will it take him to saw a similar log into six pieces?
-It takes David 7 min to saw a log in 3 pieces, and they want six pieces, so easy, all you have to do is times 7 by 2 and times 3 by 2. Then you have the answer. 7min x 2 = 14 mins, 3logs x 2 = 6 logs and there you have it.It will take him 14 minutes.


2) A small gear turns 18 times in the same time that a large gear turns 4 times, how many times will the large gear turn if the small gear turns 54 times?
-
54 divided by 18 = 3 , so 3 multiplied by 4 = 12 .
The larger gear will turn 12 times by the time the small gear turns 54 times.

3) Last night 30 cm of snow fell in 6 h. If it continues snowing at the same rate, how long will it take for 45 cm of snow to fall? Determine the answer two different ways.
- First way , find half of 30 , and half of six, easy! 30 divided by 2 = 15 cm , 6 divided by 2 = 3h, add that to what we have and we got , 45 cm in 9 hours.( 30 + 15 = 45 cm , 6 + 3 = 9 hours)
- Second way , Dividing 45 by 30 = 1.5 , then dividing 9 by 6 = 1.5 , so you multiply 30 and 6 , and you get
45 cm, in 9 hours.

Wycliffe+Well+Roadhouse
NOW WE STOPPED THE ALIENS , YAY!



Thanks for reading!!! :D

6 comments:

  1. haha nice sribe post justin you should have put examples of the proportion on a ratio table or something to represent it more useful but anyway nice scribe post

    ReplyDelete
  2. good job justin

    your post is well explained...and i like how you answered question no.3--very deatailed--

    could have added a diagram because it helps people a lot

    GOOD JOB AGAIN

    ReplyDelete
  3. Good Job Justin! I like the picture that you chose.

    ReplyDelete
  4. good job justin, i like how you change the colour of the question to a different one

    you could have spaced out the answer more because it didnt seem interesting to read.

    ReplyDelete

About This Blog

Lorem Ipsum

Statcounter

Calculator





powered by math calculator at calculator.net

  © Blogger templates Psi by Ourblogtemplates.com 2008

Back to TOP