1.76减0点目录
0点76减九分之二加1点24减9分之七
=(0.76 1.24)-(2/9 7/9)
=2-1
=1
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十七分之五减0点三减0点七加十七分之十二
5/17-0.3-0.7 12/17
=5/17 12/17-(0.3 0.7)
=1-1
=0
1-0点一二=0.88
1/2减0.34=0.5-0.34=0.16
1/3-0点五六=1/3-14/25=-17/75
1/4-0点七=-0.45