![\frac{7}{8} - \frac{3}{4 } + \frac{7}{10} \frac{7}{8} - \frac{3}{4 } + \frac{7}{10}](https://tex.z-dn.net/?f=+%5Cfrac%7B7%7D%7B8%7D++-++%5Cfrac%7B3%7D%7B4+%7D++%2B++%5Cfrac%7B7%7D%7B10%7D+)
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Step-by-step explanation:
7 3 7
__ - __ + __
8 4 10
7/8 = 7×5/8×5=35/40
3/4=3×10/4×10=30/40
7/10=7×4/10×4=28/40
35 30 28 33
__ - __ + ___ = ___
40 40 40 40
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