Tính bằng cách thuận tiện a, \(1\frac{1}{24}\)x\(5\frac{2}{5}\)x\(3\frac{7}{9}\) x\(2\frac{2}{17}\)b,\(2\frac{3}{13}\) x \(\frac{26}{58}\)x 4 x \(2\frac{15}{24}\)x \(\frac{8}{21}\) LÀM NHANH GIÚP MÌNH NHA !!!! MÌNH ĐANG CẦN...
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Tính bằng cách thuận tiện
a, \(1\frac{1}{24}\)x\(5\frac{2}{5}\)x\(3\frac{7}{9}\) x\(2\frac{2}{17}\)
b,\(2\frac{3}{13}\) x \(\frac{26}{58}\)x 4 x \(2\frac{15}{24}\)x \(\frac{8}{21}\)
LÀM NHANH GIÚP MÌNH NHA !!!!
MÌNH ĐANG CẦN GẤP
a. \(1\frac{1}{24}\cdot5\frac{2}{5}\cdot3\frac{7}{9}\cdot2\frac{2}{17}\)
\(=\frac{25}{24}\cdot\frac{27}{5}\cdot\frac{34}{9}\cdot\frac{36}{17}\)
\(=\left(\frac{25}{24}\cdot\frac{27}{5}\right)\cdot\left(\frac{34}{9}\cdot\frac{36}{17}\right)=\frac{5\cdot27}{24}\cdot\frac{2\cdot17\cdot9\cdot4}{9\cdot17}=\frac{5\cdot27}{24}\cdot8\)
\(=\frac{5\cdot27\cdot8}{24}=\frac{5\cdot9\cdot3\cdot8}{24}=\frac{45\cdot24}{24}=45\)
b. \(2\frac{3}{13}\cdot\frac{26}{58}\cdot4\cdot2\frac{15}{24}\cdot\frac{8}{21}\)
\(=\frac{29}{13}\cdot\frac{26}{58}\cdot4\cdot\frac{21}{8}\cdot\frac{8}{21}=\frac{29\cdot13\cdot2}{13\cdot29\cdot2}\cdot4\cdot\frac{21\cdot8}{8\cdot21}=1\cdot4\cdot1\)
\(=4\)