Question 798455
Note that {{{ -(-x) = x }}} no matter what {{{ x }}} is, so
6 1/4 -( -3 3/4 ) = 6 1/4 + 3 3/4
-----------------------------
Add the fractions:
 1/4 + 3/4 = 1
Add the whole numbers
6 + 3 = 9
-------------
 1 + 9 = 10