Réponse :
Bonjour
[tex]\frac{50}{100} =\frac{5\times 10}{10 \times 10} = \frac{5}{10} \times \frac{10}{10}= \frac{5}{10} \times 1 = \frac{5}{10}\\donc \frac{5}{10} = \frac{50}{100}\\\\\\frac{2}{2000} = \frac{2 \times 1}{2 \times 1000}=\frac{2}{2} \times \frac{1}{1000} =1 \times \frac{1}{1000} =\frac{1}{1000} \\donc\frac{1}{1000}=\frac{2}{2000}\\\\\frac{6}{10} = \frac{3 \times 2}{5 \times 2} =\frac{3}{5} \times \frac{2}{2} =\frac{3}{5} \times 1 =\frac{3}{5} \\donc \frac{6}{10} \neq \frac{4}{5} \\[/tex]
[tex]\frac{8}{12} =\frac{4\times2}{6\times 2}=\frac{4}{6} \times \frac{2}{2} =\frac{4}{6} \times 1 =\frac{4}{6} \\donc \frac{8}{12} = \frac{4}{6} \\\\\frac{40}{10} =\frac{4\times 10}{1 \times 10}=\frac{4}{1} =4\\donc \frac{4}{100}\neq \frac{40}{10} \\\\\frac{10}{5} =\frac{10 \times 2}{5 \times 2}=\frac{20}{10} \\donc \frac{10}{5}\neq \frac{5}{10}[/tex]
[tex]\frac{6}{4} =\frac{3\times 2}{2 \times 2} =\frac{3}{2} \\donc \frac{6}{4}\neq \frac{2}{3} \\\\\frac{20}{100} =\frac{2 \times 10 }{10 \times 10} =\frac{2}{10} \\donc\frac{2}{10}=\frac{20}{100}\\\\\frac{7}{14} =\frac{7 \times 1}{7 \times 2} =\frac{1}{2} \\donc \frac{7}{14} =\frac{1}{2} \\\\\frac{18}{20} =\frac{9\times2}{10 \times 2} =\frac{9}{10} \\donc\frac{9}{10}=\frac{18}{20}\\\\\frac{51}{100} =\frac{5,1 \times 10}{10 \times 10} = \frac{5,1}{10} \\donc \frac{5,1}{10}=\frac{51}{100}\\[/tex]
[tex]\frac{4}{4} =1\\\frac{5}{5} =1\\donc \frac{4}{4} =\frac{5}{5}[/tex]
