Question 152608
Note: {{{6=60/10}}}


{{{6&9/10=6+9/10=60/10+9/10=(60+9)/10=69/10}}}



So {{{6&9/10=69/10}}}



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Here's a short cut:



{{{6&9/10=(6*10+9)/10=(60+9)/10=69/10}}}