Tính: a) (-3,5).(1 3/5); b) -5/9 . (-2 1/2)
Giải thích
a) (−3,5).135=−3510⋅1.5+35=−72⋅85=−7.82.5=−7.45=−285
b) −59⋅−212==−59⋅−2.2+12=−59⋅−52=−5.(−5)9.2=2518
a) (−3,5).135=−3510⋅1.5+35=−72⋅85=−7.82.5=−7.45=−285
b) −59⋅−212==−59⋅−2.2+12=−59⋅−52=−5.(−5)9.2=2518