Решение выражений из столбца Д

1. $$\frac{1}{9} + \frac{5}{6} = \frac{2}{18} + \frac{15}{18} = \frac{17}{18}$$


2. $$\frac{7}{12} + 1\frac{1}{4} = \frac{7}{12} + \frac{5}{4} = \frac{7}{12} + \frac{15}{12} = \frac{22}{12} = \frac{11}{6} = 1\frac{5}{6}$$


3. $$\frac{5}{7} + \frac{19}{36} = \frac{180}{252} + \frac{133}{252} = \frac{313}{252} = 1\frac{61}{252}$$


4. $$\frac{3}{8} + \frac{11}{27} = \frac{81}{216} + \frac{88}{216} = \frac{169}{216}$$


5. $$\frac{1}{3} + 2\frac{8}{9} = \frac{1}{3} + \frac{26}{9} = \frac{3}{9} + \frac{26}{9} = \frac{29}{9} = 3\frac{2}{9}$$


6. $$\frac{1}{8} + \frac{5}{18} = \frac{9}{72} + \frac{20}{72} = \frac{29}{72}$$