如题所述
10.4+9.6×0.35
=10.4+(10-0.4)×0.35
=10.4+(10×0.35-0.4×0.35)
=10.4+(3.5-0.14)
=10.4+3.5-0.14
=13.76
13.74
后计步加号应该是减号,错了。
13.9-0.14