Răspuns:
= - 8/5
Explicație pas cu pas:
7 1/2 = (7 × 2 + 1)/2
0,45(3) = (453 - 45)/900 = 408/900 = 34/75
_______________________
7 1/2 × [0,45(3) - 2/3] = 15/2 × (34/75 - 2/3)
= 15 /2 × (- 16/75) =
- 8/5
