-2/15 +12/13 +-13/15 - 1/13 -6/13-( 17/13 -1)

Đáp án:

`a)`= `-2/13`

`b)`= `-10/13`

Giải thích các bước giải:

`a)``-2/15 +12/13 + (-13/15) - 1/13`

= `(-2/15+ -13/15)+(12/13-1/13)`

= `(-1)+11/13`

= `-2/13`

`b)``-6/13-( 17/13 -1)`

= `-6/13-4/13`

= `-10/13`

_Học tốt nhé_

a)

` -2/15 + 12/13 + -13/15 - 1/13 `

`= [ (-2/15) + (-13/15) ] + ( 12/13 - 1/13 )`

`= ( -1 ) + 11/13`

`= ( -1/1 ) + 11/13`

`= ( -13/13 ) + 11/13`

`= -2/13`

b)

` -6/13 - ( 17/13 - 1 )`

`= -6/13 - ( 17/13 - 1/1 )`

`= -6/13 - ( 17/13 - 13/13 )`

`= -6/13 - 4/13`

`= -10/13`

#Huy