4,5 x {0,(45) + 4,(5)] : 0,1(25)} =
= 45/10 × [45/99 + (45-4)/9] : (125-1)/990 =
= 9/2 × (45/99+ 41/9) : 124/990 =
= 9/2 × (45 + 41×11)/99 × 990/124 =
= 9/2 × (45 + 451)/99 × 990/124 =
= 9/2 × 496/99 × 990/124 =
990 se simplifica cu 99, si ramane 10
496 se simplifica cu 124,si ramane 4
= 9/2 × 4 × 10 =
se simplifica 4 cu 2,ramane 2.
= 9 × 2 × 10 =
= 180
