Question

13 целых 7/12-10 целых 2/3-2 целых 1/2

Answer 1

       7              2          1             19            8             6        5
13 -----  -  10 -----  - 2  ---- =  12  ----- - 10 ------  -  2 ----- = -------
      12             3           2            12           12           12       12

Answer 2

$13 frac{7}{12} - 10 frac{2}{3} - 2 frac{1}{2} = frac{163}{12} - frac{32}{3} - frac{5}{2} = frac{163 - 128 - 30}{12} = frac{5}{12}$