18又3/4+(-2.75)+(2.125)+(+12又5/7)+(-4又1/8)
问题描述:
18又3/4+(-2.75)+(2.125)+(+12又5/7)+(-4又1/8)
答
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