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![frac{7}{9}:(- frac{2}{27}):(-5 frac{1}{4} )*1 frac{2}{7} = frac{7}{9}: frac{2}{27}:frac{21}{4}* frac{9}{7} =frac{7}{9}* frac{27}{2}*frac{4}{21}* frac{9}{7} = \ =frac{27}{2}*frac{4}{21} =frac{9}{2}*frac{4}{7} =frac{9}{1}*frac{2}{7} =18/7=2 frac{4}{7} frac{7}{9}:(- frac{2}{27}):(-5 frac{1}{4} )*1 frac{2}{7} = frac{7}{9}: frac{2}{27}:frac{21}{4}* frac{9}{7} =frac{7}{9}* frac{27}{2}*frac{4}{21}* frac{9}{7} = \ =frac{27}{2}*frac{4}{21} =frac{9}{2}*frac{4}{7} =frac{9}{1}*frac{2}{7} =18/7=2 frac{4}{7}](https://tex.z-dn.net/?f=+frac%7B7%7D%7B9%7D%3A%28-+frac%7B2%7D%7B27%7D%29%3A%28-5+frac%7B1%7D%7B4%7D+%29%2A1+frac%7B2%7D%7B7%7D+%3D+frac%7B7%7D%7B9%7D%3A+frac%7B2%7D%7B27%7D%3Afrac%7B21%7D%7B4%7D%2A+frac%7B9%7D%7B7%7D+%3Dfrac%7B7%7D%7B9%7D%2A+frac%7B27%7D%7B2%7D%2Afrac%7B4%7D%7B21%7D%2A+frac%7B9%7D%7B7%7D+%3D+%5C+%3Dfrac%7B27%7D%7B2%7D%2Afrac%7B4%7D%7B21%7D+%3Dfrac%7B9%7D%7B2%7D%2Afrac%7B4%7D%7B7%7D+%3Dfrac%7B9%7D%7B1%7D%2Afrac%7B2%7D%7B7%7D+%3D18%2F7%3D2++frac%7B4%7D%7B7%7D+)
б)
![6 frac{3}{14} *4 frac{5}{9} -6 frac{3}{14}*1 frac{5}{9}+2 frac{11}{14}*3= 6 frac{3}{14} (4 frac{5}{9} -1 frac{5}{9})+2 frac{11}{14}*3= \ =6 frac{3}{14} *3 +2 frac{11}{14}*3= 3( 6 frac{3}{14} +2 frac{11}{14})= 3*9=27 6 frac{3}{14} *4 frac{5}{9} -6 frac{3}{14}*1 frac{5}{9}+2 frac{11}{14}*3= 6 frac{3}{14} (4 frac{5}{9} -1 frac{5}{9})+2 frac{11}{14}*3= \ =6 frac{3}{14} *3 +2 frac{11}{14}*3= 3( 6 frac{3}{14} +2 frac{11}{14})= 3*9=27](https://tex.z-dn.net/?f=6+frac%7B3%7D%7B14%7D+%2A4+frac%7B5%7D%7B9%7D+-6+frac%7B3%7D%7B14%7D%2A1+frac%7B5%7D%7B9%7D%2B2+frac%7B11%7D%7B14%7D%2A3%3D+++6+frac%7B3%7D%7B14%7D+%284+frac%7B5%7D%7B9%7D+-1+frac%7B5%7D%7B9%7D%29%2B2+frac%7B11%7D%7B14%7D%2A3%3D++%5C+%3D6+frac%7B3%7D%7B14%7D+%2A3+%2B2+frac%7B11%7D%7B14%7D%2A3%3D++3%28+6+frac%7B3%7D%7B14%7D+%2B2+frac%7B11%7D%7B14%7D%29%3D++++3%2A9%3D27+++)
б)
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