Réponses

2014-09-21T14:23:07+02:00

Bonjour

1 + 2 x 3 + 4 x 5 + 6

= 1 + ((2 x (3 + 4)) x 5) + 6 

= 1 + (2 x 7 x 5) + 6

= 1 + (14 x 5) + 6

= 1 + 70 + 6

= 77