calculer le plus simplement possible: a) 2,7 x 10/3; b) 3/100 x 200; c) 54 x 2/6.

a) 2,7 x 10/3 = 270/3 = 90

b) 3/100 x 200 = 200/300 = 2 x 100 / 3 x 100 = 2/3

c) 54 x 2/6 = 108/26 = 18