Đáp án:
Giải thích các bước giải:
`a) \frac{-24}{32}=\frac{-3}{4}`
`\frac{35}{-50}=\frac{7}{-10}`
`\frac{-11}{-121}=\frac{1}{11}`
`\frac{25}{100}=\frac{1}{4}`
`b) \frac{3^{10}.(-5)^{21}}{(-5)^{20}.3^{12}}`
`=\frac{3^{10}.(-5)^{20}.(-5)}{(-5)^{20}.3^{10}.3^2}`
`=\frac{-5}{3^2}=\frac{-5}{9}`
`c) \frac{2^{3}.3^{4}}{2^{3}.3^{2}.5}`
`=\frac{2^{3}.3^{2}.3^2}{2^{3}.3^{2}.5}`
`=\frac{3^2}{5}=\frac{9}{5}`
`\frac{2^{4}.5^{2}.11^{2}.7}{2^{3}.5^{3}.7^{2}.11}`
`=\frac{2^{3}.2.5^{2}.11.11.7}{2^{3}.5^{2}.5.7.7.11}`
`=\frac{2.11}{5.7}=\frac{22}{35}`
`d) \frac{-11^{5}.13^7}{11^{5}.13^8}`
`=\frac{-11^{5}.13^7}{11^{5}.13^{7}.13}`
`=\frac{-1}{13}`