Răspuns :
10 × 5 : 2 + 5 × 8 + 9 × 0 + 1 =
50 : 2 + 5 × 8 + 9 × 0 + 1 =
25 + 5 × 8 + 9 × 0 + 1 =
25 + 40 + 9 × 0 + 1 =
25 + 40 + 0 + 1 =
65 + 0 + 1 =
= 66
50 : 2 + 5 × 8 + 9 × 0 + 1 =
25 + 5 × 8 + 9 × 0 + 1 =
25 + 40 + 9 × 0 + 1 =
25 + 40 + 0 + 1 =
65 + 0 + 1 =
= 66