Question

QUANTO É 1/5 DIVIDIDO POR 1/2- 3/4 DIVIDIDO POR 1/7- 2/3 DIVIDIDO POR 5/7- 7/12 DIVIDIDO POR 2/5 AJUDA POR FAVOR!!!!! É URGENTEEEE

Answer 1

Resposta:

Explicação passo-a-passo:

$\displaystyle \frac{\frac{1}{5}}{\frac{1}{2}}-\frac{\frac{3}{4}}{\frac{1}{7}}-\frac{\frac{2}{3}}{\frac{5}{7}}-\frac{\frac{7}{12}}{\frac{2}{5}}=\frac{1}{5}.\frac{2}{1}-\frac{3}{4}}.{\frac{7}{1}}-\frac{2}{3}}.{\frac{7}{5}-\frac{7}{12}}.\frac{5}{2}=\frac{2}{5}-\frac{21}{4}-\frac{14}{15}-\frac{35}{24}=\\\\\\\frac{48-630-112-175}{120} =-\frac{869}{120}$

mmc(5, 4, 15, 24)

5, 4, 15, 24 | 2

5, 2, 15, 12 | 2

5, 1, 15, 6 | 2

5, 1, 15, 3 | 3

5, 1, 5, 1 | 5

1, 1, 1, 1 | 1

mmc(5, 4, 15, 24)= 2 . 2 . 2 . 3 . 5 = 120

Answer 2

Resposta:

$Divisao de fracoes:~mantenha~uma~fracao~inalterada~e~multiplique\\pelo~inverso~da~outra\\ \\ primeiro~as~divisoes~e~em~seguida~as~subtracoes$

$\frac{1}{5}:\frac{1}{2}-\frac{3}{4}:\frac{1}{7}-\frac{2}{3}:\frac{5}{7}-\frac{7}{12}:\frac{2}{5}=\\ \\\frac{1}{5}.\frac{2}{1}-\frac{3}{4}.\frac{7}{1}-\frac{2}{3}.\frac{7}{5}-\frac{7}{12}.\frac{5}{2}=\\ \\\frac{2}{5}-\frac{21}{4}-\frac{14}{15}-\frac{35}{24}\\ \\mmc=120\\ \\\frac{48-630-112-175}{120}=-\frac{869}{120}$