Question

gente me ajudem por favor eu vou agradecer muito! e marcarei como a melhor resposta! responder só quem sabe, ​

Answer 1

1)

$\frac{1100}{4004}=\\\\\frac{44*25}{4004} =\\\\\frac{44*25}{44*91}=\\\\\frac{25}{91}\\\\Resposta:\\\frac{25}{91}$

R.: letra ''A''.

2)

$\frac{9}{7}-\frac{7}{9}=\\mmc(7,9)= 63\\\\\frac{81}{63} -\frac{49}{63} =\\\\\frac{81-49}{63} \\\\\frac{32}{63} \\\\Resposta:\\\frac{32}{63}$

R.: letra ''D''.

3)

$1+\frac{3}{2}+\frac{5}{4}+\frac{7}{8}=\\mmc(2,4,8)=8\\\\\frac{1*8}{8}+\frac{12}{8}+\frac{10}{8}+\frac{7}{8}=\\\\\frac{8+12+10+7}{8}=\\\\\frac{37}{8}\\\\Resposta:\\\frac{37}{8}$

R.: letra ''C''.

4)

$3\frac{1}{4}-1\frac{3}{8}=\\\\2\frac{5}{4}-1\frac{3}{8}=\\\\1+\frac{7}{8}=\\\\1\frac{7}{8}\\\\Resposta:\\1\frac{7}{8}$

R.: letra ''B''.

Espero ter ajudado!!!