Выполните аычесление -3/7-9/14 ,-5/9-(-3/4 )

Question

Выполните аычесление -3/7-9/14 ,-5/9-(-3/4 )

Answer 1

-3/7-9/14=-6/14-9/14=-15/14= -1_1/14

-5/9-(-3/4)=-5/9+3/4=-20/36+27/36=7/36

Comments

...=4_5/17 - 5_17/17= -1_12/17

Answer 2

-3/7-9/14 = -(6/14+9/14) = -15/14 = -1  1/14

-5/9-(-3/4) = -5/9 + 3/4 = -20/36 + 27/36 = 27/36-20/36 = 7/36

Comments

:)