não entendi nada!!!

Ola mario

1.3 - 1.333...+ 2 + √(-3)^2/15 =

13/10 - 4/3 + 2 - 3/15 =

13/10 - 4/3 + 2 - 1/5 =

39/30 - 40/30 + 60/30 - 6/30 = 99/30 - 46/30 = 53/30

pronto