1 7/8*(5/6+1,3)-2,45=
= 1 11/20 = 1,55
1 7/8*(5/6+1,3)-2,45= 1,55 1) 5/6 + 1,3 = 5/6 + 1 3/10 = 5/6 + 13/10 = 25/30 + 39/30 = 64/30 2) 1 7/8 * 64/30 = 15/8 * 64/30 = 8/2 = 4 3) 4 - 2,45 = 1,55