Réponses

2014-09-18T22:19:16+02:00
2/3 + - 5/9 x (- 12/5)
= 2/3 - 5/9 x - 12/5
= 2/3 + 60/45
= 2 x 15 / 3 x 15 + 60/45
= 30/45 + 60/45
= 90/45
= 45 x 2 / 45 x 1
= 2/1
= 2
2014-09-18T22:23:02+02:00
2/3+(-5/9)×(-12/5) 2/3+(-5×-12)/9×5 2/3+60/45 Simplifions 60/45=(4×15)/(3×15)=4/3 2/3+4/3=6/3=2