Calcul mental du 17 mars

6 + 6 + 4 =

3 + 8 + 9 = 

7 + 7 + 3 =

9 + 6 + 1 =

(5 + 1) x 2 = 

8 + 10 + 5 =

2 + 9 + 6 =

15 + 4 + 5 =

7 + 15 + 6 =

6 + 6 + 8 =