Bonjour
Fraction irréductible :
2/3+ 6/27+ 7/9-5/3
= (2 x 3) / (3 x 3) + (3 x 2) / (3 x 9) + 7/9 - (5 x 3) / (3 x 3)
= 6/9 + 2/9 + 7/9 - 15/9
= 15/9 - 15/9
= 0
B= (1+1/3)/(3/5)
B = [(1 x 3) / (1 x 3) + 1/3] x 5/3
B = (3/3 + 1/3) x 5/3
B = 4/3 x 5/3
B = 20/9.
