Сократите дроби рациональным способомМатематика 6 класс номер 1326

1.
$........=- \frac{5.4*0.2*4*1.2* \frac{14}{3} }{1.2*0.5*0.49* \frac{15}{7} } =- \frac{5.4*0.2*4*1.2*14*7}{1.2*0.5*0.49*15*3} =- \frac{3*1.8*0.2*2*14*7}{7*0.07*15*3} = \\ \\ - \frac{3*0.6*0.2*0.07*200}{0.07*3*5} =- 0.6*0.2*40=-4.8$

2. $.........=- \frac{1.6*0.2*0.9*3*0.19*3* \frac{8}{3} }{0.9*0.19*1.6* \frac{16}{5} } =- \frac{0.2*3*3*8*5}{16*3} =- \frac{0.2*3*8*5}{8*2} = \\ \\ - \frac{0.2*3*5}{0.2*10}=- \frac{3}{2} =-1.5$

3. $...........= \frac{ \frac{17}{6} *90*0.09*1.5*0.3}{ \frac{17}{8}*1.5* \frac{4}{3} *0.09 }= \frac{17*8*3*90*0.3}{17*6*4} = 90*0.3=27$

4. $..............=- \frac{0.16* \frac{51}{8}*5.4*6.3 }{1.4*2.7* \frac{17}{3}*0.36 } =- \frac{0.16*51*3*2.7*2*0.7*9}{0.7*2*2.7*17*8*0.36} = \\ \\ - \frac{8*0.02*17*3*3*9}{17*8*9*0.04} =- \frac{3*3}{2} =- \frac{9}{2} =-4.5$