Question

АЛГЕБРА 8 КЛАСС. ПОЖАЛУЙСТА С РЕШЕНИЕМ

Answer 1

1)$frac{12 frac{4}{5}*3 frac{3}{4}-4 frac{4}{11}*4 frac{1}{8} }{11 frac{2}{3}:2 frac{4}{7} } = frac{ frac{64*15}{5*4} - frac{48*33}{11*8} }{ frac{35*7}{3*18} }= frac{48-18}{ frac{245}{54} }= 30:245:54= frac{324}{49}=6 frac{30}{49}$

2)$frac{28 frac{4}{5}: 13frac{5}{7} +6 frac{3}{5}: frac{2}{3}}{1 frac{11}{16}:2 frac{1}{4} }= frac{ frac{144}{5}* frac{1}{13}* frac{5}{7}+ frac{33}{5}* frac{3}{2}}{ frac{27}{16}: frac{9}{4}}= frac{144* frac{1}{13}* frac{1}{7}+ frac{99}{10}}{ frac{27}{16}* frac{4}{9} }= frac{ frac{144}{91}+ frac{99}{10}}{ frac{3}{4} } =$ $10449:910:3:4= frac{6966}{455} =15 frac{141}{455}$

3)$frac{2 frac{3}{8}: frac{3}{4}+24 frac{7}{9} }{7 frac{1}{8}-157 frac{4}{5}:24}= frac{ frac{19}{8}* frac{4}{3}+ frac{223}{9} }{ frac{57}{8}- frac{789}{5}* frac{1}{24}}= frac{ frac{19}{2}* frac{1}{3}+ frac{223}{9}}{ frac{57}{8}- frac{263}{5}* frac{1}{8} }= frac{ frac{19}{6}+ frac{223}{9} }{ frac{57}{8}- frac{263}{40}}=503:18:11:20=$ $frac{5030}{99} = 50 frac{80}{99}$

4)$frac{(1 frac{1}{2}+2 frac{2}{3}+3 frac{3}{4})*3 frac{3}{5} }{14-15 frac{1}{8}:2 frac{1}{5} }= frac{((1+2+3)+( frac{1}{2}+ frac{2}{3}+ frac{3}{4}))* frac{18}{5} }{14- frac{121}{8}: frac{11}{5}}= frac{(6+ frac{23}{12})* frac{18}{5} }{14- frac{11}{8}*5 }= frac{(6+1+ frac{11}{12})* frac{18}{5} }{14- frac{55}{8} }$ $frac{(7+ frac{11}{12})* frac{18}{5}}{ frac{57}{8} }= frac{ frac{19}{12}* frac{18}{5} }{ frac{57}{8} } = frac{ frac{57}{2} }{ frac{57}{8} }=4$

Answer 2

Скоро допишу остальное...