Question

Faça as operações com as frações abaixo. Se for possível, simplifique.
Lembre-se da regra dos sinais
a)(-4/7)-(-3/3)=
b)(+12/5)-(+2/3)=​

Answer 1

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A-

${\red{( - \frac{4}{7}) - ( - \frac{3}{3}) }} \\ \\ {\red{ - \frac{4}{7} - ( - \frac{3}{3} )}} \\ \\ {\red{ - \frac{4}{7} - ( - 1)}} \\ \\ {\red{ - \frac{4}{7} + 1}} \\ \\ {\red{ \frac{ - 4 + 7}{7} }} \\ \\ {\red{ \frac{3}{7} }}$

B-

${\red{( + \frac{12}{5}) - ( + \frac{2}{3} )}} \\ \\ {\red{ \frac{12 \times 3}{5 \times 3} - \frac{2}{3} }} \\ \\ {\red{ \frac{12 \times 3}{5 \times 3} - \frac{2 \times 5}{3 \times 5} }} \\ \\ {\red{ \frac{36}{5 \times 3} - \frac{2 \times 5}{3 \times 5} }} \\ \\ {\red{ \frac{36}{15} - \frac{2 \times 5}{3 \times 5} }} \\ \\ {\red{ \frac{36}{15} - \frac{10}{3 \times 5} }} \\ \\ {\red{ \frac{36}{15} - \frac{10}{15} }} \\ \\ {\red{ \frac{36 - 10}{15} }} \\ \\ {\red{ \frac{26}{15} }}$

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