Monday, November 16, 2009

How I Stopped an Alien Invasion Using Proportion

Today an alien landed on earth, me and my friend saw it snooping around and telling its home planet something. I said to my friend "Tell the government, I'll stall it."
I had to think fast, the alien looked pretty dumb so I thought about using something I learned today... proportions! That could slow him down. I walked up to the alien and started to talk about proportions.

- A proportion is a relationship thats says to rates or ratios are equal. A proportion can be expressed as a fraction.
60 sit-ups divide3 20 sit-ups 1 x5 5
__ = __
________ = ________ 2 x5 10

3 min divide3 1min

The alien just looked at me like I was crazy, but I talking.

Page 67

4.A) Three Dinner rolls cost 99c. 99c/3rolls = 33c/1roll

B) Seven identical objects have a mass of 14 kg. 7objects/14kg = 1object/2kg


Page 68

13. Two quarters have the same value of ten nickels. What is the value of five quarters in nickels?
2Q/10n = 5Q/25n

Page 69

27. If A:B = 4:5, find the ratio of 5a:7b. 5a:7b = 20:35.

Uh-oh I was running out of stuff to say, luckily my friend came back with the government. Now the alien is safely locked up in area 53.1.

1 comments:

Jemineth873 January 26, 2010 at 10:33 PM  

good job , on both story and explanation.

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