Решите примеры: 1/3-(+2/3) -2/5-(-3/5) -2/5-(-3/5) -3/7-(+4/7) 5/8-(-7/8) -1/9-(+2/9)
1/3-(+2/3)=1/3-2/3=-1/3 -2/5-(-3/5)=-2/5+3/5=1/5 -3/7-(+4/7)=-3/7-4-7=-1 5/8-(-7/8)=5/8+7/8=1 и 1/2 -1/9-(+2/9)=-1/9-2/9=-1/3
Спасибо