Respostas

2014-05-09T13:40:28-03:00
Fica assim o resultado final:
3/7
3/4
1/5
2/5

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2014-05-09T13:41:52-03:00
 \frac{18}{42}  \frac{18}{42}  ÷ 2 =  \frac{9}{21}  ÷ 2 =  \frac{3}{7}

 \frac{24}{32}  \frac{24}{32}  ÷ 2 =  \frac{12}{16}  ÷ 2 =  \frac{6}{8}  ÷ 2 =  \frac{3}{4}

 \frac{4}{20}  \frac{4}{20}  ÷ 2 =  \frac{2}{10}  ÷ 2 =  \frac{1}{5}

 \frac{2}{5} - Esta na forma irredutivel

Espero ter ajudado

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