1.0.4x125x25x0.8=
(0.4x25) x (125x0.8)
=10x100=10001.25x(8+10)
=1.25x8+1.25x10=10+12.5=22.59123-2.(123+8.8)=9123-123-8.8
=9000-8.8=8991.2
3.1.24x8.3+8.3x1.76
=8.3x(1.24+1.76)=8.3x3=24.9
找寻整数，然后进行混合运算。
1.0.4x125x25x0.8=
(0.4x25) x (125x0.8)
=10x100=10001.25x(8+10)
=1.25x8+1.25x10=10+12.5=22.59123-2.(123+8.8)=9123-123-8.8
=9000-8.8=8991.2
3.1.24x8.3+8.3x1.76
=8.3x(1.24+1.76)=8.3x3=24.9
找寻整数，然后进行混合运算。
