1)4.5/6 + (2.3/4 - 2.1/6):2.4/5
4.5/6 + (2.3/4 - 2.1/6):2.4/5 1)2.3/4=0,575 2)2.1/6=0.35 3)0.575-0.35=0,225 4)4,5/6=0,75 5)0,225/2,4=0,09375 6)0,09375/5=0,01875 7)0,75+0,01875=0,76875