Répondre :
Exo 29
Politesse oubliée !!!!
3/5 = 3×7/5×7 = 21/35
3/4 = 3×15/4×15 = 45/60
80/100 = 80÷20/100÷20 = 4/5
49/21 = 49÷7/21÷7 = 7/3
Exo 30
4/3 = 20/15
5/6 = 30/36
3,4/7,8 = 34/78
56/24 = 7/3
72/45 = 8/5
Bonne soirée.
Exo 29
Politesse oubliée !!!!
3/5 = 3×7/5×7 = 21/35
3/4 = 3×15/4×15 = 45/60
80/100 = 80÷20/100÷20 = 4/5
49/21 = 49÷7/21÷7 = 7/3
Exo 30
4/3 = 20/15
5/6 = 30/36
3,4/7,8 = 34/78
56/24 = 7/3
72/45 = 8/5
Bonne soirée.