Question

Tính kết quả sau:

-1-23+4-56-7-8-9

Nhanh hộ mk nhé!

Answer 1

- 1 - 23 + 4 - 56 - 7 - 8 - 9

= - 1 + ( - 23 ) + 4 + ( - 56 ) + ( - 7 ) + ( - 8 ) + ( - 9 )

= [ - 1 + ( - 9 ) ] + [ ( - 23 ) + ( - 7 ) ] + [ 4 + ( - 8 ) ] + ( - 56 )

= - 10 + ( - 30 ) + ( - 4 ) + ( - 56 )

= - 40 + [ ( - 4 ) + ( - 56 ) ]

= - 40 + ( - 60 ) = - 100

Answer 2

bằng -100

Answer 3

-1-23+4-56-7-8-9= -100

Answer 4

Ta có - 1 - 23 + 4 - 56 - 7 - 8 - 9

= - 1 + ( - 23 ) + 4 + ( - 56 ) + ( - 7 ) + ( - 8 ) + ( - 9 )

= [ - 1 + ( - 9 ) ] + [ ( - 23 ) + ( - 7 ) ] + [ 4 + ( - 8 ) ] + ( - 56 )

= - 10 + ( - 30 ) + ( - 4 ) + ( - 56 )

= - 40 + [ ( - 4 ) + ( - 56 ) ]

= - 40 + ( - 60 ) 

=- 100

P/s tham khảo nha