Question

resolva as multiplicações e divisões das frações​

Answer 1

Resposta:

$\:\:\:\:\:\: \pink h\pink o\pink o\blue i\blue l\blue \: \green v\green a\green m\green o\green s\green \: \orange l\orange á\orange .\green .\green .\green \:$

Explicação passo-a-passo:

$\tt \: basta \: calcularmos : \\ \\ letra \: a \: ) \\ \frac{3}{8} \times \frac{2}{5} = \frac{3 \times 2}{8 \times 5} = \frac{6}{20} \\ \\ = \frac{3 .(2) }{20.(2)} \: = \tt \: resposta \: \frac{3}{20}$

$\\ letra \: b ) \\ \frac{9}{12} \times \frac{3}{4} = \frac{3.3}{4.3} \times \frac{3}{4} = \frac{3 \times 3}{4 \times 4} \\ \\ \tt \: resposta \: = \frac{9}{16}$

$\\ letra \: c ) \\ \frac{2}{5} \times \frac{3}{7} = \frac{2 \times 3}{5 \times 7} \\ \\ \tt \: resposta \: = \frac{6}{35}$

$\\ letra \: d ) \\ \frac{5}{9} \div \frac{2}{7} = \frac{5 \times 7}{9 \times 2} = \frac{35}{18} \\ \\ \tt \: resposta \: = 1 \frac{17}{18}$

$\\ letra \: e ) \\ \frac{8}{11} \div \frac{3}{7} = \frac{8 \times 7}{11 \times 3} = \frac{56}{33} \\ \\ \tt \: resposta \: = 1 \frac{23}{33}$

$\\ letra \: f ) \\ \frac{6}{5} \div \frac{3}{8} = \frac{6 \times 8}{5 \times 3} = \frac{48}{15} \\ \\ = \frac{16 \times 3}{5 \times 3} \: \: \: \tt \: resposta \: = 3 \frac{1}{5}$

$\rm \: assim \: obtemos \: a \: resposta \\ \rm \: correta \: das \: alternativas \: .$

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