这个简单哦
转化等式即可
=27.3+73.2+73.6
=27.3+73.1+0.1+73.6
=27.3+0.1+72.6+73.1+1
=100+74.1
=174.1
27.3+73.2+72.6=27.3+72.6+73.2=99.9+73.2=100+73.2-0.1=173.2-0.1=173.1
27.4+73.3+72.6