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

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