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Có \(\frac{15.3^{11}+4.274}{9^7}=\frac{5.3.3^{11}+1096}{\left(3^2\right)^7}=\frac{5.3^{12}+1096}{3^{14}}=\frac{5.1+1096}{3^2}=\frac{5+1096}{9}=\frac{1101}{9}\)
15.30+15.73-15.3
=15.(30+73-3)
=15.100=1500
chúc bạn học tốt!
15.30+15.73-15.3
=15.(30+73-3)
=15.100
=1500
chúc học tốt
\(\dfrac{-8}{15}.\dfrac{3}{7}.\dfrac{15}{-8}.14=\left(\dfrac{-8}{15}.\dfrac{15}{-8}\right).\left(\dfrac{3}{7}.14\right)=1.6=6\)
\(\dfrac{17}{27}.\dfrac{13}{9}-\dfrac{4}{9}.\dfrac{17}{27}=\dfrac{17}{27}.\left(\dfrac{13}{9}-\dfrac{4}{9}\right)=\dfrac{17}{27}.1=\dfrac{17}{27}\)
-11/15.20/23+-11/15.3/23+-34/15
\(=\frac{-11}{15}\left(\frac{20}{23}+\frac{3}{23}\right)+\frac{-34}{15}\)
\(=\frac{-11}{15}.1+\frac{-34}{15}\)
\(=\frac{-45}{15}=-3\)
\(\frac{-11}{15}.\frac{20}{23}+\frac{-11}{15}.\frac{3}{23}+\frac{-34}{15}\)
\(=\frac{-11}{15}.\left(\frac{20}{23}+\frac{3}{23}\right)+\frac{-34}{15}\)
\(=\frac{-11}{15}.1+\frac{-34}{15}\)
\(=\frac{-11+\left(-34\right)}{15}\)
\(=\frac{-45}{15}\)
\(=-3\)
Study well ! >_<