Question

Tính nhanh

a) -677. 54 + 54. (-125) + 2. 54

b) -(324 - 267 + 252) + (133 - 76)

Answer 1

#\(N\)

`a, -677*54+54.(-125)+2.54`

`=54.(-677+-125+2)`

`=54.(-800)`

`=-43200`

`b, -(324-267+252)+(133-76)`

`=-324+267-252+133-76`

`= (-324+-76)+(133+267)-252`

`=-400+400-252`

`=-252`

Answer 2

a: =54(-677-125+2)

=54*(-800)

=-43200

b: =-324+267-252+133-76

=-400+400-252

=-252

Answer 3

a. -677 . 54 + 54 . ( - 125 ) + 2. 54

= 54 . ( -677 + ( -125 ) + 2 )

= 54 . ( -802 + 2 )

= 54 . ( -800 )

= -43200

b.- (324 - 267 + 252) + (133 - 76)

= 324 - 267 + 252 + 133 -76

= 324 +76 - 267 + 133 -252

= 400 - 400 +252

= -252