Question

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

Answer 1

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

Answer 2

a,-57-(-46)+57.(-56)

=[ (-57) + 46 ]+ [ 57.(-56) ]

= -11 + -3192

= -3203