Répondre :
B= 5/2 + 3/8 : 15/12
B= 5/2 + 3/8 x 12/15
B= 5/2 + 3x12/8x15
B= 5/2 + 36/120
B= 5/2 + 6x6/20x6
B= 5/2 + 6/20
B= 5/2 + 2x3/2x10
B= 5/2 + 3/10
B= 5x5/5x2 + 3/10
B= 25/10 + 3/10
B= 28/10
B= 2x14/2x5
B= 14/5 ( sois 2,8)
B= 5/2 + 3/8 : 15/12
B= 5/2 + 3/8 x 12/15
B= 5/2 + 3x12/8x15
B= 5/2 + 36/120
B= 5/2 + 6x6/20x6
B= 5/2 + 6/20
B= 5/2 + 2x3/2x10
B= 5/2 + 3/10
B= 5x5/5x2 + 3/10
B= 25/10 + 3/10
B= 28/10
B= 2x14/2x5
B= 14/5 ( sois 2,8)