Réponse :
Explications étape par étape
Bonsoir
-5/2 x 7/3
= (-5 x 7)/(2 x 3)
= -35/6
-13/3 x 2/5 x -7/15
= (-13 x 2 x -7)/(3 x 5 x 15)
= 182/225
7/20 x -70/3
= (7 x -70)/(20 x 3)
= (-7 x 7 x 10)/(2 x 10 x 3)
= -49/6
9/7 x -7/5 x 2/27
= (9 x -7 x 2)/(7 x 5 x 27)
= (-9 x 7 x 2)/(7 x 5 x 3 x 9)
= (-63 x 2)/(63 x 15)
= -2/15
- 4 x 3/4 x 7/6
= (-4 x 3 x 7)/(4 x 6)
= (-4 x 3 x 7)/(4 x 3 x 2)
= -7/2
