Помогите пожалуйста N 635 б)

1. [latex] \frac{3}{2} [/latex] - [latex] \frac{2}{5} [/latex] = [latex] \frac{11}{10} [/latex] 2. [latex] \frac{3}{4} [/latex] + [latex] \frac{5}{6} [/latex][latex] = \frac{19}{12} [/latex] 3. [latex] \frac{11}{4} * \frac{10}{11} = \frac{10}{4} = 2,5 [/latex] 4. [latex] \frac{19}{12} * \frac{6}{19} = \frac{1}{2} = 0,5[/latex] 5. 0,5 + 2,5 = 3

1) 1[latex] \frac{1}{2}- \frac{2}{5} = \frac{3}{2} - \frac{2}{5} = \frac{15}{10} - \frac{4}{10}= \frac{11}{10} [/latex] 2)  [latex] \frac{3}{4} + \frac{5}{6}= \frac{9}{12}+ \frac{10}{12}= \frac{19}{12} [/latex] 3)2[latex] \frac{3}{4} : \frac{11}{10}= \frac{11}{4} [/latex]·[latex] \frac{10}{11} = \frac{5}{2} =2 \frac{5}{10} [/latex] 4)[latex] \frac{19}{12}:3 \frac{1}{6} = \frac{19}{12} : \frac{19}{6} = \frac{19}{12} [/latex]·[latex] \frac{6}{19}= \frac{1}{2} [/latex] 5)2[latex] \frac{5}{10} + \frac{1}{2} =2 \frac{5}{10}+ \frac{5}{10} =2 \frac{10}{10}=3 [/latex]