5/-4.16/25+4/-9.8/15
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\(\dfrac{-4}{9}.\dfrac{7}{15}+\dfrac{4}{-9}.\dfrac{8}{15}\)
=\(\dfrac{-4}{9}.\left(\dfrac{7}{15}+\dfrac{8}{15}\right)\)
=\(\dfrac{-4}{9}.1\)=\(\dfrac{-4}{9}\)
\(\dfrac{-4}{9}.\dfrac{7}{15}+\dfrac{4}{-9}.\dfrac{8}{15}\)
\(=\dfrac{-4}{9}.\dfrac{7}{15}+\dfrac{-4}{9}.\dfrac{8}{15}\)
\(=\dfrac{-4}{9}.\left(\dfrac{7}{15}+\dfrac{8}{15}\right)\)
\(=\dfrac{-4}{9}.1\)
\(=\dfrac{-4}{9}\)
\(\frac{-4}{9}.\frac{7}{15}+\frac{4}{-9}.\frac{8}{15}\)
\(\Rightarrow\frac{-4}{9}.\frac{7}{15}+\frac{-4}{9}.\frac{8}{15}\)
\(\Rightarrow\frac{-4}{9}.\left(\frac{7}{15}+\frac{8}{15}\right)\)
\(\Rightarrow\frac{-4}{9}.\frac{15}{15}\)
\(\Rightarrow\frac{-4}{9}.1\)
\(\Rightarrow\frac{-4}{9}\)
\(\frac{-4}{9}.\frac{7}{15}+\frac{4}{-9}.\frac{8}{15}\)
\(=\frac{-4}{9}.\frac{7}{15}+\frac{-4}{9}.\frac{8}{15}\)
\(=\frac{-4}{9}.\left(\frac{7}{15}+\frac{8}{15}\right)\)
\(=\frac{-4}{9}.\frac{15}{15}\)
\(=\frac{-4}{9}.1\)
\(=\frac{-4}{9}\)
\(B=\frac{15^3.4^4.30}{5^4.16^2.3^2}\)
\(\Rightarrow B=\frac{3.5.3.5.3.5.4^4.3.5.2}{5.5.5.5.4^4.3.3}\)
\(\Rightarrow B=\frac{3.3.2}{1}\)
\(\Rightarrow B=18\)
\(\dfrac{5}{-4}.\dfrac{16}{25}+\dfrac{4}{-9}.\dfrac{8}{15}=-\dfrac{4}{5}+\left(-\dfrac{32}{135}\right)=-\dfrac{28}{27}\)
\(\dfrac{5}{-4}.\dfrac{16}{25}+\dfrac{4}{-9}.\dfrac{8}{15}=\dfrac{-4}{5}+\dfrac{-32}{135}=\dfrac{-28}{27}\)