Răspuns:
= 19/50 = 0,38
Explicație pas cu pas:
5,2+5,(2)-5,02-5,0(2) = ?
5,2+5,(2)-5,02-5,0(2) =
= 52/10 + (52-5)/9 - 502/100 - (502-50)/90 =
= ¹⁰⁾52/10 + ¹⁰⁾47/9 - 502/100 - 452/90 =
= 520/100 - 502/100 + 470/90 - 452/90 =
= (520-502)/100 + (470-452)/90 =
= ⁹⁾18/100 + ¹⁰⁾18/90 = 162/900 + 180/900 =
= (162+180)/900 = 342/900⁽² = 171/450⁽³ = 57/150⁽³=
= 19/50 = 0,38
