Réponse:
A= 2-6 : 3＋3x4＋1
= 2-2＋3x4＋1
= 2-2＋12＋1
= 0＋12＋1
= 12＋1
=13
B= 2.5＋3x7-35 : 5
2.5＋21-35 : 5
2.5＋21-7
23.5-7
16.5
C= 12:3 -1＋7x8
4-1＋56
3＋56
59
D= 4.5-5 : 2＋1.5x2
4.5 - 2.5＋3
2＋3
5
