The expression 4 + (-6 3/4) as a mixed number in simplest form is -2 3/4
4 + (-6 3/4)
= 4 + (-27/4)
= 4 - 27/4
= (16-27) / 4
= -11 / 4
= - 2 3/4
Therefore, 4 + (-6 3/4) as a mixed number in simplest form is -2 3/4
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