calculer: 1: (5\3-1\9)÷(1\2+2\3) 2: 18\25÷(-27\15)

Bonjour,

1 = (5/3-1/9):(1/2+2/3)
1 = (15/9-1/9): (3/6+4/6)
1 = 14/9 : 7/6
1 = 14/9 x 6/7
1 = 84/63 = 4/3

2 = 18/25:(-27/15)
2 = 18/25 x (15/-27)
2 = 270/-675
2= -2/5