oblicz.   [latex]-2frac{1}{3}cdot(-frac{27}{28}) [/latex]   [latex]3frac{1}{2}-3frac{1}{6}:(-2frac{1}{9})[/latex]   [latex](-1frac{1}{7}cdot1frac{11}{24}):frac{3}{5}[/latex]

-7/3*(-27/28)=189/84=2,25=2 1/4 ============================= 7/2-19/6:(-19/9)=7/2-19/6*(-9/19)=7/2+9/6=21/6+9/6=30/6=5 ============================ (-8/7*35/24)*5/3=- 280/168*5/3=-1400/504=-2 392/504= - 2 98/126=-2 49/63= =-2 7/9   licze na naj