ULYSSENEUF
Answered

Bonjour j'ai vraiment besoin d'aide s'il vous plait
[tex]\frac{3}{4} - \frac{11}{12} =\\\\\frac{3}{4} +\frac{11}{12} =\\\\\frac{5}{6} -\frac{7}{18}[/tex] =

Sagot :

MAUDMARINE

Bonjour

3/4 - 11/12 = (3 x 3) / (4 x 3) - 11/12 = 9/12 - 11/12 = - 2/12 = (2 x - 1) / (2 x 6) = - 1/6

3/4 + 11/12 = 9/12 + 11/12 = 20/12 = (4 x 5) / (4 x 3) = 5/3

5/6 - 7/18 = (5 x 3) / (6 x 3) - 7/18 = 15/18 - 7/18 = 8/18 = (2 x 4) / (2 x 9) = 4/9.