b)
1,1:(-0,1)+2,7:(-0,13)+1,6:(-0,4)
c) -1/4:0,5-6,4:0,2+(1,25-5/6)-0,9
P r o s z e
![B 1101270131604c 140564021255609P R O S Z E class=](https://pl-static.z-dn.net/files/d80/4718663c5cf80084a8c67fb531aed792.jpg)