Sagot :
bonjour
( 2/5 - 5 /6) : 2 /3
= ( 12/30 - 25/30) : 2/3
= - 13 /30 x 3 /2
= - 39/60
= - 13/20
☘️ Salut ☺️
[tex]\rule{6cm}{1mm}[/tex]
Calculons :
[tex]\dfrac{\dfrac{2}{5} - \dfrac{5}{6}}{\dfrac{2}{3}}[/tex]
[tex]\dfrac{\dfrac{12 - 25}{30}}{\dfrac{2}{3}}[/tex]
[tex]\dfrac{- \dfrac{13}{30}}{\dfrac{2}{3}}[/tex]
[tex]- \dfrac{13}{30} \times\dfrac{3}{2}[/tex]
[tex]- \dfrac{39}{60}[/tex]
[tex]\boxed{\boxed{\green{- \dfrac{13}{20}}}}[/tex]
[tex]\rule{6cm}{1mm}[/tex]