..列完整算式1.25x3.43-1.25-1.43x1.25 1.6x16+0.4x361.6的前面是空白的_数学解答

..列完整算式
1.25x3.43-1.25-1.43x1.25 1.6x16+0.4x36
1.6的前面是空白的

人气：111 ℃　时间：2020-03-01 09:36:28

解答

1.25x3.43-1.25-1.43x1.25
=1.25x(3.43-1-1.43)
=1.25x1
=1.25
1.6x16+0.4x36
=1.6x16+1.6x9
=0.4x4x(16+9)
=0.4x4x25
=0.4x100
=40