Respuesta:
a)9. (12+8)+(6.7):(21.3)
[tex]\frac{9\left(12+8\right)+\left(6.7\right)}{21.3}\\\\\\=\frac{9\left(12+8\right)+6.7}{21.3}\\\\\\=\frac{186.7}{21.3}\\\\\\=8.76525\dots[/tex]
b)(15.4:4:10:2)+152-(100:5.4)
[tex]\left(\frac{\frac{15.4}{4}}{\frac{10}{2}}\right)+152-\left(\frac{100}{5.4}\right)\\\\\\=-\frac{100}{5.4}+\frac{\frac{15.4}{4}}{\frac{10}{2}}+152\\\\\\=-\frac{100}{5.4}+\frac{30.8}{40}+152\\\\\\=\frac{152}{1}-\frac{100}{5.4}+\frac{30.8}{40}\\\\\\=\frac{32832}{216}-\frac{4000}{216}+\frac{\frac{831.6}{5}}{216}\\\\\\=\frac{\frac{831.6}{5}+28832}{216}\\\\\\=\frac{28998.32}{216}\\\\\\=134.25148\dots[/tex]
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Verified answer
Respuesta:
a)9. (12+8)+(6.7):(21.3)
[tex]\frac{9\left(12+8\right)+\left(6.7\right)}{21.3}\\\\\\=\frac{9\left(12+8\right)+6.7}{21.3}\\\\\\=\frac{186.7}{21.3}\\\\\\=8.76525\dots[/tex]
b)(15.4:4:10:2)+152-(100:5.4)
[tex]\left(\frac{\frac{15.4}{4}}{\frac{10}{2}}\right)+152-\left(\frac{100}{5.4}\right)\\\\\\=-\frac{100}{5.4}+\frac{\frac{15.4}{4}}{\frac{10}{2}}+152\\\\\\=-\frac{100}{5.4}+\frac{30.8}{40}+152\\\\\\=\frac{152}{1}-\frac{100}{5.4}+\frac{30.8}{40}\\\\\\=\frac{32832}{216}-\frac{4000}{216}+\frac{\frac{831.6}{5}}{216}\\\\\\=\frac{\frac{831.6}{5}+28832}{216}\\\\\\=\frac{28998.32}{216}\\\\\\=134.25148\dots[/tex]