a ) 5/7×7
b ) -2/9×9
c ) -3×-4/9
Merci d'avance ! ​


Sagot :

AYUDA

5/7 x 7 = (5x7)/7 = 5

-2/9 x 9 = - (2x9) / 9 = - 2

et

-3 x (-4/9) = (3x4) / 9 = (3x4) / (3x3) = 4/3