Sagot :

evanrandrianarisoa

Réponse:

tu mets tout au même dénominateur et tu calcules
A. 4/1x2 - 3/2 = 8/2 - 3/2 = 5/2
B. 2x3/3 - 1/3 = 6/3 - 1/3 = 5/3
C. 9/4 - 4/4 = 5/4
D. 7x4/1x4 + 1/4 = 11/4 + 1/4 = 12/4
E. 16/3 - 3x3/1x3 = 16/3 - 9/3 = 7/3
F. 4x7/7 + 5/7 = 28/7 + 5/7 = 33/7
G. 6x6/6 - 5x3/3x2 - 5/6 = -10/6
H. 2x4/1x4 + 3/4 + 7x2/2x2 = 8/4 + 3/4 + 14/4 = 25/4
I. 7x25/25 - 9x5/5x5 - 13/25 = 175/25 - 45/25 - 13/25 = 117/25