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Sagot :

ELODIANE

Réponse:

Exercice 1 :

  • A =
  • [tex]\frac{7}{4} - \frac{15}{4} \times \frac{2}{9} \\ \frac{7 \times 9}{4 \times 9} - \frac{30}{36} \\ \frac{63}{36} - \frac{30}{36} \\ \frac{33}{36} [/tex]

  • B =
  • [tex]( \frac{2}{5} - 2) \div \frac{1}{15} \\ ( \frac{2}{5} - \frac{2 \times 5}{1 \times 5} ) \div \frac{1}{15} \\ ( \frac{2}{5} - \frac{10}{5} ) \div \frac{1}{15} \\ \frac{ - 8}{5} \div \frac{1}{15} \\ \frac{ - 8}{5} \times \frac{15}{1} \\ \frac{ - 120}{5} [/tex]

  • C=
  • [tex]( \frac{4 \times 3}{1 \times 3} - \frac{5}{3} ) \div ( \frac{3}{2} \times \frac{3}{1} ) \\ ( \frac{12}{3} - \frac{5}{3} ) \div \frac{9}{2} \\ \frac{7}{3} \div \frac{9}{2} \\ \frac{7}{3} \times \frac{2}{9} \\ \frac{14}{27} [/tex]

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