emil_005
幼苗
共回答了20个问题采纳率:90% 举报
1.(2/18-3/18-1/18)X36
=2/18*36-3/18*36-1/18*36
=4-6-2
=-4
2.(1/4-1/2-1/8)X128
=1/4*128-1/2*128-1/8*128
=32-64-16
=-48
3.[9X(-4)]X(-1/4)
=9*(-4)*(-1/4)
=9*1
=9
4.2.25x(-2.3)X3/25
=2.25*3/25*(-2.3)
=-621/1000
5.(-2.1)X6.5X(-3/7)
=(-2.1)*(-3/7)*6.5
=0.9*6.5
=5.85
1年前
追问
9
举报
emil_005
4. 2.25x(-2.3)X3/25 =2.25*3/25*(-2.3) =27/100*(-2.3) =-621/1000