7/8-4/9 caucule e simplifique quando possivel​

Explicação passo-a-passo:

7/8-4/9 =

63/72 - 32/72 =

31/72

[tex]resposta: a) \frac{3}{6} . \frac{4}{3} = \frac{12}{18} = \frac{2}{3} b) \frac{9}{6} . \frac{2}{4} = \frac{18}{24} = \frac{3}{4} c) \frac{5}{8} . \frac{2}{3} = \frac{10}{24} = \frac{5}{12} d) \frac{18}{1} . \frac{1}{9} = \frac{18}{9} = 2e) \frac{4}{3} ÷ \frac{5}{2} = \frac{4}{3} . \frac{2}{5} = \frac{8}{15} f) \frac{2}{3} ÷ \frac{8}{5} = \frac{2}{3} . \frac{5}{8} = \frac{10}{24} = \frac{5}{12} g) \frac{6}{4} ÷ \frac{5}{1} = \frac{6}{4} . \frac{1}{5} = \frac{6}{20} = \frac{3}{10}[tex]

espero ter ajudado! se estiver errado me desculpe! : )