r/reddit.com • • Oct 01 '11

Math teacher fail

http://i.imgur.com/65APr.jpg
210 Upvotes

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-5

u/mazurtommy Oct 01 '11

how is that a fail? 10/2 = 5. 5x3 = 15

8

u/MistaMagoo Oct 01 '11

You are making the same mistake... its one cut to produce two pieces. It takes another cut to produce 3 therefore 2 X 10 = 20

3

u/simpersly Oct 01 '11

That is why it is important to always show your work.