75*76分之3
=（76-1）*（3/76）
=76*3/76-3/76
=3-3/76
=225/76
9.81*0.1+0.5*98.1+0.049*981
=981*0.001+981*0.05+0.049*981
=981*（0.001+0.05+0.49）
=981*0.1
=98.1
56.8*10.1
=56.8*（10+0.1）
=568-5.68
=562.32
39.5*3.6+843*0.9
=39.5*4*0.9+843*0.9
=0.9*（158+843）
=0.9*1001
=900.9
6895.6785/6.785*67.85
这题出错了吧
3333*6666
=3*1111*6*1111
=18*1234321
=（20-2）*1234321
=24686420-2468642
=44435556