Răspuns:
- 3 si 1/24
Explicație pas cu pas:
a = -(3 si 1/4 - 4 si 1/8 + 2 si 1/6) + [ 4,08(3) - 5 si 5/6] = ?
3 si 1/4 = (3·4+1)/4 = 13/4
4 si 1/8 = (4·8+1)/8 = 33/8
2 si 1/6 = (2·6+1)/6 = 13/6
4,08(3) = (4083-408)/900 = 3675/900⁽²⁵ = 147/36⁽³ = 49/12
5 si 5/6 = (5·6+5)/6 = 35/6 =>
a = -(⁶⁾13/4 - ³⁾33/8 + ⁴⁾13/6) + (49/12 - ²⁾35/6)
a = -(78-99+52)/24 + (49-70)/12
a = -31/24 - ²⁾21/12
a = (-31-42)/24
a = -73/24 = - 3 si 1/24
