Bonjour
Calculer et donner le résultat sous forme de fraction
a/1/20+4/5 = 1/20 + (4 x 4) / (5 x 4) = 1/20 + 16/20 = 17/20
b/7/9+2/8 = (7 x 8) / (9 x 8) + (2 x 9) / (8 x 9) = 56/72 + 18/72 = 74/72 = (2 x 37) / (2 x 36) = 37/36
c/5/6-1/30 = (5 x 5) / (6 x 5) - 1/30 = 25/30 - 1/30 = 24/30 = (6 x 4) / (6 x 5) = 4/5
d/19/28-3/7 = 19/28 - (3 x 4) / (7 x 4) = 19/28 - 12/28 = 7/28 = (7 x 1) / (7 x 4) = 1/4.
