Sagot :
Bonjour
a. 2/7 : 3/5 = 2/7 x 5/3 = 10/21
b. - 5/4 : 9/- 11 = - 5/4 x - 11/9 = 55/36
☘ Salut ☺️
[tex]\rule{6cm}{1mm}[/tex]
[tex]\boxed{\boxed{\green{Pour\:diviser\:une\:fraction\:par\:une\:fraction\:on\:la\:multiplie\:par\:la\:fraction\:inverse.}}}[/tex]
- Recopions et complétons.
[tex]a.\:\ \boxed{\boxed{\frac{2}{7}\div\frac{3}{5}=\frac{2}{7}\times \frac{5}{3}=\blue{\frac{10}{21}}}}[/tex]
[tex]b.\:\ \boxed{\boxed{\frac{-5}{4}\div\frac{9}{-11}=\frac{-5}{4}\times \frac{-11}{9}=\blue{\frac{55}{36}}}}[/tex]
[tex]\rule{6cm}{1mm}[/tex]