Khan/khan-exercises — pull request #62760 by petercollingridge (2013-08-20 11:03:43+00:00)
Title: Rewrite exercise to mix number types and simplify

After suggestions I've written this exercise to remove repeating decimals and to mix exercise types. The questions now require less calculation, but should test whether students can convert between number types. I wonder if the hints should be more extensive, or whether it's OK to assume that students can add decimals at this point.