Bonjour :)
Exercice 75
[tex]\frac{4}{3} - (\frac{1}{2} + \frac{7}{8})[/tex]
[tex]\frac{4}{3} - (\frac{4}{8} + \frac{7}{8})[/tex]
[tex]\frac{4}{3} - \frac{11}{8}[/tex]
[tex]\frac{32}{24} - \frac{33}{24}[/tex]
[tex]\frac{32-33}{24}[/tex]
[tex]\frac{-1}{24}[/tex]
[tex]\frac{4}{3} - \frac{7}{5} - (\frac{3}{5} - \frac{5}{7})[/tex]
[tex]\frac{4}{3} - \frac{7}{5} - (\frac{21}{35} - \frac{25}{35})[/tex]
[tex]\frac{4}{3} - \frac{7}{5} - (\frac{-4}{35})[/tex]
[tex]\frac{4}{3} - \frac{7}{5} + \frac{4}{35}[/tex]
[tex]\frac{20}{15} - \frac{21}{15} + \frac{4}{35}[/tex]
[tex]\frac{-1}{15} + \frac{4}{35}[/tex]
[tex]\frac{-7}{105} + \frac{12}{105}[/tex]
[tex]\frac{-7+12}{105}[/tex]
[tex]\frac{5}{105} = \frac{1}{21}[/tex]
Exercice 76
A = a + b + c
[tex]\frac{1}{2} - \frac{2}{3} + \frac{5}{4}[/tex]
[tex]\frac{6}{12} - \frac{8}{12} + \frac{15}{12}[/tex]
[tex]\frac{6-8+15}{12}[/tex]
[tex]\frac{13}{12}[/tex]
B = a - b - c
[tex]\frac{1}{2} + \frac{2}{3} - \frac{5}{4}[/tex]
[tex]\frac{6}{12} + \frac{8}{12} - \frac{15}{12}[/tex]
[tex]\frac{6+8-15}{12}[/tex]
[tex]\frac{14-15}{12}[/tex]
[tex]\frac{-1}{12}[/tex]
C = a - (b - c)
[tex]\frac{1}{2} - (\frac{-2}{3} - \frac{5}{4})[/tex]
[tex]\frac{1}{2} - (\frac{-8}{12} - \frac{15}{12})[/tex]
[tex]\frac{1}{2} - (\frac{-8-15}{12})[/tex]
[tex]\frac{1}{2} - (\frac{-23}{12})[/tex]
[tex]\frac{1}{2} + \frac{23}{12}[/tex]
[tex]\frac{6}{12} + \frac{23}{12}[/tex]
[tex]\frac{6+23}{12}[/tex]
[tex]\frac{29}{12}[/tex]
