Khan/khan-exercises — Issue #15348: Negative number word problems - Correct answer not accepted
Author: KhanBugz
Created: 2012-03-04 06:03:09+00:00
State: open
Labels: leopard, other, safari

Reporter: mr.Carpenterman@gamail.com

Daniel was scuba diving 25 meters below sea level when he spotted a beautiful fish below. To take a proper photograph, Daniel dove 28 meters until he was level with the fish, staring into its eyes.

I answered 53 and it was marked incorrect.

Then I asked for the solution and got;

Where was the fish relative to sea level?

Daniel was initially 25 meters below sea level, which can be written as a negative number, −25 meters.

Daniel dove down 28 meters, so we can subtract that distance from Daniel’s initial level to find out where the fish is.

Fish’s position relative to sea level =−25 meters−28 meters=−53 meters

[negative_number_word_problems.html?seed=54&problem=scuba_result](http://sandcastle.khanacademy.org/media/castles/Khan:master/exercises/negative_number_word_problems.html?seed=54&problem=scuba_result&debug)

[Answer timeline](http://sandcastle.khanacademy.org/media/castles/Khan:master/exercises/negative_number_word_problems.html?seed=54&problem=scuba_result&debug&activity=%5B%5B%22incorrect-activity%22%2C%22%5B%5C%2253%5C%22%5D%22%2C111%5D%2C%5B%22incorrect-activity%22%2C%22%5B%5C%223%5C%22%5D%22%2C7%5D%2C%5B%22incorrect-activity%22%2C%22%5B%5C%2228%5C%22%5D%22%2C19%5D%2C%5B%22hint-activity%22%2C%220%22%2C3%5D%2C%5B%22hint-activity%22%2C%220%22%2C3%5D%2C%5B%22hint-activity%22%2C%220%22%2C3%5D%2C%5B%22incorrect-activity%22%2C%22%5B%5C%2253%5C%22%5D%22%2C7%5D%2C%5B%22incorrect-activity%22%2C%22%5B%5C%2253%5C%22%5D%22%2C12%5D%2C%5B%22incorrect-activity%22%2C%22%5B%5C%2253%5C%22%5D%22%2C2%5D%2C%5B%22incorrect-activity%22%2C%22%5B%5C%2253%5C%22%5D%22%2C2%5D%2C%5B%22incorrect-activity%22%2C%22%5B%5C%2253%5C%22%5D%22%2C2%5D%5D)

[["53"],["3"],["28"],["53"],["53"],["53"],["53"],["53"],["53"]]

Mozilla/5.0 (Macintosh; PPC Mac OS X 10_5_8) AppleWebKit/534.50.2 (KHTML, like Gecko) Version/5.0.6 Safari/533.22.3

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