Question

Tính nhanh

Answer 1

`34 . ( 2 1/17 - 3 5/34)`

`= 34 . [ ( 2-3) + ( 1/17 - 5/34)]`

`= 34 . (-1) (-3)/34`

`=34 . (-37)/34`

`=-37`

__________________________

`75 . ( -4/25 - 7 1/15 + 4 7/45)`

`= 75  . ( -4/25 - 106/15 + 187/45)`

`= 75 . (-691)/225`

`=(-691)/3`

Answer 2

\(d.=34.\left(\dfrac{35}{17}-\dfrac{107}{34}\right)=2.35-107=-37\\ e.=-4.3-75.\dfrac{106}{15}+75.\dfrac{187}{45}=-12-5.106+\dfrac{4.187}{3}=-12-530+\dfrac{748}{3}=-542+\dfrac{748}{3}=\dfrac{-878}{3}\)

Answer 3

`a, = 34 . (35/17 - 107/34)`

`= 70 - 107`

`= -37`

`b, = -12 - 530 + 935/3`

`= -691/3`

Answer 4

d, \(34\left(\dfrac{35}{17}-\dfrac{107}{34}\right)=\dfrac{34.35}{17}-\dfrac{34.107}{34}=70-107=-37\)

e, \(75\left(-\dfrac{4}{25}-\dfrac{106}{15}+\dfrac{187}{45}\right)=\dfrac{-4.75}{25}-\dfrac{106.75}{15}+\dfrac{187.75}{45}=-12-530+\dfrac{935}{3}=-\dfrac{691}{3}\)