Bài 1 : Tính
1) (-12).13+13.(-22) 2)(-79).(-88)+(-21).(-88)
3)11.107+11.18-25.11 4) 5.4-15.5+7
5) 60.(45-15)-45.(60-15) 6)85.(17-35)-18.(40-55)
7) 2155-(174+2155)+(-68+174) 8)-25.72+25.21-49.25
9)8154-(674+8154)+(-98+674) 10) 44.(-36)+22.(-28)
Loga
Sinh Học lớp 12
