correction Devoir libre 4

156. 3,6. 2,9. 10. 65. 32,6. 46,44. 4,8. 9. 0. 0. 4,8. 43,2. (12 8) 5 20 5 100. 12 8 5 12 40 52. 12 (8 5) 12 13 156 ... 13 (4 7) 5 13 11 5 143 5 138.