oblicz jasiu: a) 4,2+1,4= 2,35+1/2= 3,203+1/4= 14i2/3+0,5= b) 2,35−3/4= 4,15−1i1/4= 31,105−1/8= 5/8−0,5= c) 12,2*1/4= 4,5*2i1/2= 7,2*1/3= 4,9*2/7= d) 1,3:5i1/5= 2,35:9i2/5= 1i4/5:2,25= 1,7:1/20=