Khan/khan-exercises — Issue #11299: Adding and subtracting negative numbers - scratch pad or virtual pencil issue
Author: KhanBugz
Created: 2012-01-15 20:25:42+00:00
State: open
Labels: chrome, other, scratchpad, vista

Reporter: jk_hbc@yahoo.com

After I click my mouse for the 1st time, the virtual pencil starts sticking to the scratch pad. Even when I release my mouse button, the pencil's tip will not leave and keeps leaving the trace on the pad. IT'S REALLY ANNOYING AND RUINS THE LEARNING APPETITE.

[adding_and_subtracting_negative_numbers.html?seed=178&problem=MINUS](http://sandcastle.khanacademy.org/media/castles/Khan:master/exercises/adding_and_subtracting_negative_numbers.html?seed=178&problem=MINUS&debug)

[Answer timeline](http://sandcastle.khanacademy.org/media/castles/Khan:master/exercises/adding_and_subtracting_negative_numbers.html?seed=178&problem=MINUS&debug&activity=%5B%5D)

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Mozilla/5.0 (Windows NT 6.0) AppleWebKit/535.7 (KHTML, like Gecko) Chrome/16.0.912.75 Safari/535.7

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