Question

A) 1/7+2/3. B)2/5-1/8. C) -4/3 -7/2+10/7. D) -5/4+7/2 -8/3

Answer 1

Resposta:

$A)\frac{1}{7}+\frac{2}{3}\\\frac{3+14}{21}=\frac{17}{21}\\\\B)\frac{2}{5}-\frac{1}{8}\\\frac{16-5}{40}=\frac{11}{40}\\\\C)-\frac{4}{3}-\frac{7}{2}=\frac{-8-21}{6}\\-\frac{29}{6}+\frac{10}{7}=\frac{-203+60}{42}\\=-\frac{143}{42}\\\\D)-\frac{5}{4}+\frac{7}{2}=\frac{-5+14}{4}\\\frac{9}{4}-\frac{8}{3}=\frac{27-32}{12}\\=-\frac{5}{12}$

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