18又3/4+(-2.75)+(2.125)+(+12又5/7)+(-4又1/8)

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18又3/4+(-2.75)+(2.125)+(+12又5/7)+(-4又1/8)

18又3/4+(-2.75)+(2.125)+(+12又5/7)+(-4又1/8)
=18.75-2.75+2.125-4.125+12又5/7
=16-2+12又5/7
=26又5/7

26you5/7