1/5x2/6x3/7x4/8 = 1/5x1/3x3/7x1/2 = (1/5x1/2) x (1/3x3/7) = 1/10 x 1/7 = 1/70

bằng 8 nhé bạn

tích mk nha 

kb lun

( 4 x 5 ) + 6 - ( 6 x 3 ) 

= ( 20 + 6 ) - 18

= 26 - 18 

= 8

\(\dfrac{5}{6}\times3+\dfrac{20}{6}\times2-1:\dfrac{6}{5}\)
\(=\dfrac{5}{6}\times3-\dfrac{5}{6}+\dfrac{20}{6}\times2\)
\(=\dfrac{5}{6}\times\left(3-1\right)+\dfrac{20}{6}\times2\)
\(=\dfrac{5}{6}\times2+\dfrac{20}{6}\times2\)
\(=\left(\dfrac{5}{6}+\dfrac{20}{6}\right)\times2\)
\(=\dfrac{25}{6}\times2\)
\(=\dfrac{25}{3}\)

#DatNe

\(\dfrac{5}{6}\) \(\times\) 3 + \(\dfrac{20}{6}\) \(\times\) 2 - 1 : \(\dfrac{6}{5}\)

= \(\dfrac{5}{6}\) \(\times\) 3 + \(\dfrac{20}{6}\) \(\times\) 2 - \(\dfrac{5}{6}\)

= \(\dfrac{5}{6}\) \(\times\) 3 + \(\dfrac{5}{6}\) \(\times\) 8 - \(\dfrac{5}{6}\) \(\times\)1

= \(\dfrac{5}{6}\) \(\times\) ( 3 + 8 - 1)

= \(\dfrac{5}{6}\) \(\times\)10

= \(\dfrac{25}{3}\)

\(108\times5+108\times96-108=108\times\left(5+96-1\right)\)

                                                              \(=108\times100=10800\)

`108xx5+108xx96-108`

`=108xx(5+96-1)`

`=108xx100`

`=10800`

ko cần lời giải nhé

(3+2-5) x 4/15= 0 x 4/15 = 0