17+5(-17)

=17.1+5(-17)

=-17.(-1)+5.(-17)

=-17.(-1+5)

=-17.4

=-68

k nah...^_^...kb nữa!!!

17 + 5(-17)

= 17 + (-5) . 17

= 17 . [(-5 + 1]

= 17 . (-4)

= -68

Thực hiện phép tính:

\(\left(-17\right)+5+8+17+\left(-3\right)\)

\(=\left[\left(-17\right)+17\right]+\left[5+8+\left(-3\right)\right]\)

\(=0+10\)

\(=10\)

(-17)-5-8+17(-3)

= (-17+17)+(-5-8-3)

= 0+(-16)=-16

25-(15-8+3)+(12-19+10)

= 25-15+8-3+12-19+10

= (25+10+8+12)+(-15-3-19)

= 55+(-37)

= 55-37 = 18

a,=10

b,\(\frac{1}{35}\)

c,9

Mình cũng giống bạn Leo

a, - ( - 9 ) . 5 . ( -3 ) . 2 

 =  [ - ( - 9 ) . ( - 3 ) ] . ( 5 . 2 ) 

= - 27 . 10 

= - 270 

c,  37. ( - 17 ) + ( - 17 ) . 63 

= ( - 17 ) . ( 63 + 37 ) 

= ( - 17 ) . 100 =   - 1700 

b,  ý này mk ko hiểu đề bài lắm :( 

chắc thế này :

\(\frac{9}{17}.\frac{21}{13}+\frac{5}{17}.\frac{9}{13}-\frac{8}{17}.2\)

\(=\frac{9}{17}.\frac{21}{13}+\frac{5}{13}.\frac{9}{17}-\frac{8}{17}.2\)

\(=\frac{9}{17}.\left(\frac{21}{13}+\frac{5}{13}\right)-\frac{8}{17}.2\)

\(=\frac{9}{17}.2-\frac{8}{17}.2\)

\(=2.\left(\frac{9}{17}-\frac{8}{17}\right)\)

\(=2.\frac{1}{17}\)

\(=\frac{2}{17}\)

1/17.(189/13+45/13)-16/17=1/17.18-16/17=18/17-16/17=2/17

`31/17+(-5/13)+(-8/3)-14/17`

`=(31/17-14/17)-(5/13-8/3)`

`=17/17-(15/39-104/39)`

`=1-(-89/39)`

`=1+89/39`

`=39/39+89/39`

`=128/39`

\(1\dfrac{14}{15}-\dfrac{5}{17}-\dfrac{12}{17}-\dfrac{14}{15}\\ =\left(1\dfrac{14}{15}-\dfrac{14}{15}\right)-\left(\dfrac{5}{17}+\dfrac{12}{17}\right)\\ =\left[1+\left(\dfrac{14}{15}-\dfrac{14}{15}\right)\right]-1=1-1=0\)

= 3415 bn nhé . đúng thì k nha 

= 2015 + 5 x [300-100]

= 2015 + 5 x 200

= 2015 + 1000

= 3015