Tinh hop li nau co the
a,-57-(-46)+57.(-56)
b,(-16).(-125).(-6).(-10)
c,-25.134-13.(-250)
d,-62.(27-64)-64.(62-27)
e,-18.(-16+20)-20.(6-18)+.(-18-20)
neu lam duoc cacu nao thi lam ,minh khong khuyen khich lam cau e dau nhe nhung ai lam duoc het ca minh tick cho
a) -57 . (-46) + 57 . ( -56 )
= 57 ( 46 -56 )
= 57 . (-10) = -570
b) (-16).(-125).(-6).(-10)
= (-2).(-8).(-125).(-6).(-10)
= (-2).1000,(-6).(-10)
= 20. (-6) . 1000
= -120 . 1000 = -120 000
c) (-25). 134 - 13.(-250)
= (-250). 13,4 - 13. (-250)
= (-250) . ( 13,4-13 )
= (-250) . ( 0,4 )
= ( -250 ) . 5 : 2 = -625
d)
-62 . ( 27-64) - 64 (62- 27)
= -62 . 27 - (-62 . 64 ) - 64. 62 + 64.27
= -62.27 + 64.27
= 27 ( 64-62 ) = 27 .2 = 54
e) -18 (-16 +20) -20.(6-18)+ (-18-20)
= -18 . (-6) + (-18). 20 - 20.6 +20.18+(-18-20)
=18 . 6 - 20.18 -20.6 + 20.18 -38
= 18 (6+20) -20 (18+6) -38
= 18 . 26 - 20.24 -38
= -50
câu a) chép nhầm dề rồi Ánh Lê