(10/5)*(18/13)(19/10)*(12/5)(5/21)*(5/17)(21/19)*(19/14)(19/20)*(22/8)(15/18)*(10/14)(3/核唤19)*(5/8)(19/17)*(9/17)(15/7)*(11/8)(15/21)*(11/16)(6/20)*(8/17)(7/16)*(18/16)(4/14)*(3/派扰15)(5/20)*(22/20)(5/18)*(6/23)(12/21)*(22/16)(20/10)*(14/13)(4/7)*(20/20)(13/尘氏旦24)*(17/20)(4/17)*(16/10) 1125-997 = 998+1246+9989 = (8700+870+87)÷87=125×8.8 =1.3+4.25+3.7+3.75= 17.15-(3.5-2.85)=3.4×99+3.4 =4.8×1.01 =0.4×(2.5÷73) = (1.6+1.6+1.6+1.6)×25 = 12.3-2.45-5.7-4.55= 0.125×0.25×64=64.2×87+0.642×1300=25×(8×0.4)×1.25 =3.2×7÷3.2×7= 187.7×11-187.7= 3.8÷3.9+3.9÷0.1+0.1÷3.9 = 400÷125÷8= 1.9×4×0.5= 7.2÷8×4=