2)Efectuați calculele:
a)
[tex]( - \frac{1}{2}) \div \frac{3}{7} [/tex]
b)
[tex] \frac{2}{3} \div ( - \frac{3}{5}) [/tex]
c)
[tex]( - \frac{1}{11}) \div \frac{ - 3}{7} [/tex]
7) Calculati:
a)
[tex]( - \frac{9}{16} \div ( + \frac{45}{8}) [/tex]
b)
[tex]( + \frac{6}{17}) \div ( - \frac{12}{34} )[/tex]
va roggg am nevoie urgent,dau coroana​

[tex]( - \frac{1}{2} ) \div \frac{3}{7} = - \frac{1}{2} \times \frac{7}{3} = - \frac{7}{6} \\ \\ \frac{2}{3} \div ( - \frac{3}{5} ) = \frac{2}{3} \times ( - \frac{5}{3} ) = - \frac{10}{9} \\ \\ ( - \frac{1}{11} ) \div ( - \frac{3}{7} ) = \frac{1}{11} \times \frac{7}{3} = \frac{7}{33} \\ \\ [/tex]

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[tex]( - \frac{9}{16} \div \frac{45}{8} ) = - \frac{9}{16} \times \frac{8}{45} = - \frac{1}{10} \\ \\ \frac{6}{17} \div ( - \frac{12}{34} ) = \frac{6}{17} \times ( - \frac{34}{12} ) = - \frac{2}{2} = - 1[/tex]