The document provides the solutions to 5 math problems involving addition, subtraction, and multiplication. Each problem is presented on its own slide, and the solutions are provided at the end. The problems include 27 + 94 + 73, 20 - 13 + 3, 2.5 x 3.7 x 4, 30 + 7 x 4, and 6 x 7 + 5 x 4, with the corresponding solutions being 194, 10, 37, 58, and 62.

1. Calcul mental
“Le code des opérations”
Série n° 4

2. Diapositive 1
27 + 94 + 73

4. Diapositive 2
20 - 13 + 3

6. Diapositive 3
2,5 × 3,7 × 4

8. Diapositive 4
30 + 7 × 4

10. Diapositive 5
6×7+5×4

12. FIN

13. CORRECTION

14. Diapositive 1
27 + 94 + 73
=100+94 = 194

15. Diapositive 2
20 - 13 + 3
= 7 +3 = 10

16. Diapositive 3
2,5 × 3,7 × 4
= 3,7 × 10= 37

17. Diapositive 4
30 + 7 × 4
= 30 + 28 = 58

18. Diapositive 5
6×7+5×4
= 42 + 20 = 62