Réponses

2014-09-26T19:01:21+02:00
A = 9X7 - ( 5X (6 -20) + 21/7)
63 -(5 X -14 +3)
63 - (-70) +3
63 +70 +3
136

16 / (2 X7 - 4) / 8-15 +2
16/ (14 - 4 ) / -5
16/ 10/-5 
16/-50= -8/25