计算四则混合运算

问题描述:

计算四则混合运算
(1/3+1/2+1/4)×12 378-(178+98) 8/5÷2.5-1.2×1/4
5/3×1/4÷5/2+17/4 144×99+143 2/3÷4/5+8×50%

1/3+1/2+1/4)×12 =1/3*12+1/2*12+1/4*12=4+6+3=13378-(178+98)=378-178-98=200-98=1028/5÷2.5-1.2×1/4=0.64-0.3=0.345/3×1/4÷5/2+17/4 =5/3x1/4x2/5+17/4=1/6+17/4=53/12144×99+143 =144x99+144-1=(99+1)x1...