Sagot :
Bonjour
a. 1/5 + 3/4 = 4/5
b. 6/7 - 5/7 = 1/7
c. 7/9 + 2/9 = 9/9 = 1.
Bonjour,
37. Calculer :
[tex]a = \frac{1}{5} + \frac{3}{5} = \frac{1 + 3}{5} = \boxed{ \frac{4}{5} } [/tex]
[tex]b = \frac{6}{7} - \frac{5}{7} = \frac{6 - 5}{7} = \boxed{ \frac{1}{7} } [/tex]
[tex]c = \frac{7}{9} + \frac{2}{9} = \frac{7 + 2}{9} = \frac{9}{9} = \boxed{1} [/tex]
Bonne journée.