Sagot :
Bonsoir,
6/10 = (6×2)/(10×2) = 12/20
2,5/5 = (2,5×4)/(5×4) = 10/20
36/40 = (36÷2)/(40÷2) = 18/20
Bonjour!
Note des maths: 6/10 = 6*2/10*2 = 12/20
Note d'anglais: 2,5/5 = 2,5*4/5*4 = 10/20
OU
Note d'anglais = 2,5/5 = 1/2 = 1*10/2*10 = 10/20
Hote d'histoire-géographie = 36/40 = 36:2/40:2 = 18/20
Voila, j'espere avoir aide! :)