Réponses

2013-10-05T18:09:53+02:00
 A = 6 + 3 x 4 : 1 + 2 x 2.5
= 6 + 12 : 1 + 5
= 6 + 12 + 5
= 18 + 5
= 23
2013-10-05T18:23:48+02:00
A)6+3fois4:1 +2fois2.5     6+12:1+5         6+12+5     18+5=23       ordre operatoire (multiplication,division, addition)