А) (1-1/2) : (1/2-1/3)= в) 3/4 : (1-1/4+3/8)=

а) [latex](1- \frac{1}{2} ) : ( \frac{1}{2} - \frac{1}{3} ) [/latex] 1) [latex]1- \frac{1}{2} = \frac{2}{2} - \frac{1}{2} = \frac{1}{2} [/latex] 2) [latex] \frac{1}{2} - \frac{1}{3} = \frac{3}{6} - \frac{2}{6} = \frac{1}{6} [/latex] 3) [latex] \frac{1}{2} : \frac{1}{6} = \frac{1}{2} * \frac{6}{1} = \frac{3}{1} = 3[/latex] Ответ: 3 в) [latex] \frac{3}{4} : (1- \frac{1}{4} + \frac{3}{8} )[/latex] 1) [latex]1- \frac{1}{4} + \frac{3}{8} = \frac{8}{8} - \frac{2}{8} + \frac{3}{8} = \frac{9}{8} = 1 \frac{1}{8} [/latex] 2) [latex] \frac{3}{4} : 1 \frac{1}{8} = \frac{3}{4} : \frac{9}{8} = \frac{3}{4} * \frac{8}{9} = \frac{2}{3} [/latex] Ответ: [latex] \frac{2}{3} [/latex]