927. Сократите дробь 1)81-27--------27*542)25+15---------15*83)9+36--------9*254)(11+88)*12-------------11*605)19*(29+86)----------------29*766)17*8-12*8-------------80

1) [latex] \frac{81-27}{27*54} = \frac{54}{27*54} = \frac{1}{27} [/latex] 2) [latex] \frac{25+15}{15*8} = \frac{40}{15*8} = \frac{5}{15} = \frac{1}{3} [/latex] 3) [latex] \frac{9+36}{9*25} = \frac{45}{9*25} = \frac{5}{25} = \frac{1}{5} [/latex] 4) [latex] \frac{(11+88)*12}{11*60} = \frac{99}{11*5} = \frac{9}{5} = 1 \frac{4}{5} [/latex] можно еще вот так:  [latex] \frac{(11+88)*12}{11*60} = \frac{11*12* (1+8)}{11*60} = \frac{1*9}{5} = \frac{9}{5} = 1 \frac{4}{5} [/latex] 5) [latex] \frac{19*(29+87)}{29*76} = \frac{19*29*(1+3)}{29*76} = \frac{19*29*4}{29*76} [/latex] = [latex] \frac{19*4}{76} = \frac{1}{1} = 1[/latex] 6) [latex] \frac{17*8-12*8}{80} = \frac{8*(17-12)}{80} = \frac{1*5}{10} = \frac{5}{10} = \frac{1}{2} [/latex]