Решите: 3/8-1/7=? 11/80-11/90 2/5*3/8 5*2/11 4/5:2/15 3/11:9 Это дроби пожалуйстаааааааааа!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!

13/56, 11/720, 3/20, 10/11, 6, 1/33

[latex] \frac{3}{8} - \frac{1}{7} = \frac{21-8}{56} = \frac{13}{56} [/latex] [latex] \frac{11}{80} - \frac{11}{90} = \frac{99-88}{720}= \frac{11}{720} [/latex] [latex] \frac{2}{5} * \frac{3}{8} = \frac{2*3}{5*8} = \frac{3}{20} [/latex] [latex]5* \frac{2}{11} = \frac{10}{11} [/latex] [latex] \frac{4}{5} [/latex]÷[latex] \frac{2}{15} = \frac{4*15}{5*2} =6[/latex] [latex] \frac{3}{11} [/latex]÷9=[latex] \frac{3}{99} = \frac{1}{33} [/latex]