Réponses

2014-09-29T01:17:43+02:00
B= 12 x (50+3)
B= 12 x 50 + 12 x 3
B= 600 + 36
B= 636.

C= (75-20) x 11
C= 11 x 75 - 11 x 20
C= 825 - 220
C= 605.