aidez moi svp, cest pour demain... merci c'est en 4eme
Effectue les calculs suivants en detaillant les etapes:

a. -7/50+2/75

b. 1/5+-2/3

c. 1/12-1/9

d. 4/18+5/27

e. 17/-24+(-5/36)

f. 3/16--1/12

g. 8/-17-(-1/15)

h. 2/5+-2/15-7/12
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