Réponses

2013-05-26T09:48:47+02:00

7+ 4 - 2x3 = 11 - 6 = 5

 

23 - 5x4 + 42:6 = 23 - 20 + 7 = 3 + 7 = 10

2013-05-26T10:03:03+02:00
A)7+4-2x3
=2x3
= 6-4+7
2+7
=9
b) 23-5x4+42:6
=5x4
=20+42:6
= 27-23
=4