Answer
$4 \frac{5}{8}$
Work Step by Step
$-1 \frac{1}{8} + 5 \frac{3}{4} = -\frac{9}{8} + \frac{23}{4} = -\frac{9}{8} + \frac{46}{8} = \frac{37}{8} = 4 \frac{5}{8}$
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