\[\boxed{\text{113\ (113).\ }\text{Еуроки\ -\ ДЗ\ без\ мороки}}\]
Пояснение.
Решение.
\[\textbf{а)} - \frac{10x^{2}y^{2}}{9a^{2}} \cdot \frac{27a^{3}}{5xy} =\]
\[= - \frac{10x^{2}y^{2} \cdot 27a^{3}}{9a^{2} \cdot 5xy} =\]
\[= - \ \frac{5 \cdot 2 \cdot x^{2}y^{2} \cdot 9 \cdot 3 \cdot a^{3}}{3 \cdot 3 \cdot a^{2} \cdot 5 \cdot xy} =\]
\[= - 6xya\ \]
\[\textbf{б)}\ \frac{2m^{3}}{35a^{3}b^{2}} \cdot \left( - \frac{7a^{2}b}{6m} \right) =\]
\[= - \frac{2m^{3} \cdot 7a^{2}b}{35a^{3}b^{2} \cdot 6m} =\]
\[= - \frac{2 \cdot m^{3} \cdot 7 \cdot a^{2} \cdot b}{7 \cdot 5 \cdot a^{3} \cdot b^{2} \cdot 2 \cdot 3m} =\]
\[= - \frac{m^{2}}{15ab}\]
\[\textbf{в)}\ \frac{13x}{12mn^{2}} \cdot 4m^{2}n =\]
\[= \frac{13x \cdot 4m^{2}n}{12mn^{2}} = \frac{13xm}{3n}\]
\[\textbf{г)} - ab \cdot \left( - \frac{11x^{2}}{3a^{2}b^{2}} \right) =\]
\[= \frac{ab \cdot 11x^{2}}{3a^{2}b^{2}} = \frac{a \cdot b \cdot 11 \cdot x^{2}}{3 \cdot a^{2} \cdot b^{2}} =\]
\[= \frac{11x^{2}}{3ab}\ \]
\[\boxed{\text{113.\ }\text{еуроки}\text{-}\text{ответы}\text{\ }\text{на}\text{\ }\text{пятёрку}}\]
Пояснение.
Решение.
\[\textbf{а)}\ 15x^{2} \cdot \frac{7}{bx^{3}} = \frac{15x^{2} \cdot 7}{bx³} = \frac{35}{2x}\]
\[\textbf{б)}\frac{25}{16y^{2}} \cdot 2y^{2} = \frac{25 \cdot 2y^{2}}{16y^{2}} = \frac{25}{8} =\]
\[= 3\frac{1}{8}\]
\[\textbf{в)}\ 6am^{2} \cdot \frac{4a}{3m^{3}} = \frac{6am^{2} \cdot 4a}{3m^{3}} =\]
\[= \frac{8a^{2}}{m}\ \]
\[\textbf{г)}\frac{2b}{5a^{3}} \cdot 10a^{2} = \frac{2b \cdot 10a²}{5a³} = \frac{4b}{a}\ \]