Выполните действия: 1). 3/8×4/5:9/10; 2).6/7:3/5×1 2/5 ; 3). 2 2/11×101 3/8 :3/4 ;4) 11/23×3 2/7: 5 1/2 ; 5).3/5 ×{2 2/3 : 3 1/5} ; 6). 1 1/8×{9 1/3 :1 3/4};

1)[latex] \frac{3}{8} * \frac{4}{5} : \frac{9}{10} = \frac{12}{40} : \frac{9}{10} [/latex] [latex] \frac{12}{40} * \frac{10}{9} = \frac{120}{360} = \frac{1}{3} [/latex] 2) [latex] \frac{6}{7} : \frac{3}{5} *1 \frac{2}{5} = \frac{6}{7} * \frac{5}{3} * \frac{7}{5} = \frac{6}{3} =2[/latex] 3) [latex]2 \frac{2}{11} *101 \frac{3}{8} : \frac{3}{4}  [latex]2 \frac{2}{11} +101 \frac{3}{8} : \frac{3}{4} =103 \frac{2*8}{11*8} + \frac{3*11}{8*11} : \frac{3}{4} [/latex] [latex]103 \frac{49}{88} : \frac{3}{4} = \frac{9113}{88} * \frac{4}{3} [/latex] сократить на 4(4 и 88) [latex] \frac{9113}{66} =138 \frac{5}{66} [/latex] 4) [latex] \frac{11}{23} *3 \frac{2}{7} :5 \frac{1}{2} [/latex] [latex] \frac{11}{23} * \frac{3*7+2}{7} : \frac{2*5+1}{2} = \frac{11}{23} * \frac{23}{7} : \frac{11}{2} [/latex] сократить 23 [latex] \frac{11}{7} : \frac{11}{2} = \frac{11}{7} * \frac{2}{11} [/latex] сократить 11 [latex]= \frac{2}{7} [/latex]