Question

вычислите -1/3-2/3;-1/4-5/7;-1/8-3/4;-6 целых1/2-3 целых5/7

Answer 1

-1/3 - 2/3= - 3/3= - 1

- 1/4 - 5/7= - 7/28 - 20/28= - 27/28

 - 1/8 - 3/4= - 1/8 - 6/8= - 7/8

- 6 1/2 - 3 5/7= - 6 7/14 - 3 10/14= - 9 17/14= - 10 3/14

Answer 2

$frac{1}{3}- frac{2}{3}=- frac{3}{3}=-1 \ \ -frac{1}{4}- frac{5}{7}= frac{-7-5*4}{28}=- frac{27}{28} \ \ -frac{1}{8}- frac{3}{4}= frac{-1-3*2}{8}= frac{-1-6}{8}= -frac{7}{8} \ \ -6 frac{1}{2}-3 frac{5}{7}=-9( frac{1}{2}+ frac{5}{7})=-9 frac{7+5*2}{14}=-9 frac{17}{14}=-10 frac{3}{14}$