✧ Os valores corretos das operações são :
A) -1/5
B) 11,856
C) 87/5
D) -97/30
E) -35/6
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[tex]\\ {\large \displaystyle \sf { a) -\frac{7}{10} +\frac{1}{2} }}\\\\[/tex]
[tex]\\ \large \displaystyle \sf \ MMC \ de \ 10 \ e \ 2 =\\\\ \begin{array}{r|l} 10,2&2\\ 5,1&5\\ 1,1 \end{array}\\\\\\\large \displaystyle \sf \ MMC \ de \ (10 \ e \ 2 )=2\times5=\red{10}\\\\[/tex]
[tex]\\ {\large \displaystyle \sf { - \frac{7}{10} +\frac{1\times5}{2\times5} = }}[/tex]
[tex]{\large \displaystyle \sf { - \frac{7}{10} +\frac{5}{10} = }}\\\\[/tex]
[tex]\\ {\large \displaystyle \sf { \frac{-7+5}{10} = }}[/tex]
[tex]{\large \displaystyle \sf { \frac{-2}{10} = }}[/tex]
[tex]{\green{\boxed{\boxed{{\large \displaystyle \sf {\pink{{ -\frac{2}{10} \ }}}}}}}}\\\\[/tex]
[tex]{\large \displaystyle \sf { b) \ 3 {,}9 \times3{,} 04= }} \ {\green{\boxed{\boxed{{\large \displaystyle \sf {\pink{{ 11{,}856 }}}}}}}}[/tex]
[tex]\\ {\large \displaystyle \sf { c) \ 8{,}7 \div \frac{1}{2} =}}\\\\[/tex]
[tex]\\ {\large \displaystyle \sf { 8{,}7 = \frac{87}{10} }}\\\\[/tex]
[tex]{\large \displaystyle \sf { \frac{87}{10} \div\frac{1}{2}= }}\\\\[/tex]
[tex]\\ {\large \displaystyle \sf { \frac{87}{10} \times \frac{2}{1}= }}[/tex]
[tex]{\large \displaystyle \sf { \frac{87}{10} \times2\div1= }}[/tex]
[tex]{\large \displaystyle \sf { \frac{87}{10} \times2= }}\\\\[/tex]
[tex]\\ {\large \displaystyle \sf { \frac{87}{\diagup\!\!\!\!10} \ \times \diagup\!\!\!\!2= }}[/tex]
[tex]{\green{\boxed{\boxed{{\large \displaystyle \sf {\pink{{ \ \frac{87}{5} \ }}}}}}}}\\\\[/tex]
[tex]\\ {\large \displaystyle \sf { d) \left ( -\frac{45}{15} \right ) \div \left ( \frac{7}{30} \right ) = }}\\\\[/tex]
[tex]\\ {\large \displaystyle \sf { - \frac{45}{15} - \left ( \frac{7}{30} \right ) = }}\\\\[/tex]
[tex]\\ {\large \displaystyle \sf { - \frac{45\div15}{15\div15} - \left ( \frac{7}{30} \right ) =}}[/tex]
[tex]{\large \displaystyle \sf { - \frac{3}{1} - \left ( \frac{7}{30} \right )= }}[/tex]
[tex]{\large \displaystyle \sf { - \left ( \frac{3}{1} + \frac{7}{30} \right )= }}\\\\[/tex]
[tex]\\ \large \displaystyle \sf \ MMC \ de \ 1 \ e \ 30 =\\\\ \begin{array}{r|l} 1,30 &2\\ 1,15&3\\ 1,5&5 \\ 1,1 \end{array}\\\\\\\large \displaystyle \sf \ MMC \ de \ (1 \ e \ 30 )=2\times3\times5=\red{30}\\\\[/tex]
[tex]\\ {\large \displaystyle \sf { - \left ( \frac{90}{30} + \frac{7}{30} \right )= }}\\\\[/tex]
[tex]\\ {\large \displaystyle \sf { -\frac{90+7}{30} }}[/tex]
[tex]{\green{\boxed{\boxed{{\large \displaystyle \sf {\pink{{ \ \frac{97}{30} \ }}}}}}}}\\\\[/tex]
[tex]{\large \displaystyle \sf { e) -\frac{7}{10} \div\frac{1}{5} \div\frac{3}{5} =}}\\\\[/tex]
[tex]\\ {\large \displaystyle \sf { - \frac{7}{10} \times \frac{5}{1} \times\frac{5}{3} =}}[/tex]
[tex]{\large \displaystyle \sf { -\frac{7}{10} \times 5\div1 \times\frac{5}{3} =}}[/tex]
[tex]{\large \displaystyle \sf { -\frac{7}{10} \times 5 \times\frac{5}{3} =}}\\\\[/tex]
[tex]\\ {\large \displaystyle \sf { -\frac{7}{2} \times\frac{5}{3} =}}\\\\[/tex]
[tex]\\ {\large \displaystyle \sf { -\frac{7\times5}{2\times3} =}}[/tex]
[tex]{\green{\boxed{\boxed{{\large \displaystyle \sf {\pink{{- \frac{35}{6} \ }}}}}}}}\\\\[/tex]
A) -1/5
B) 11,856
C) 87/5
D) -97/30
E) -35/6
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