This document contains a series of math problems and their solutions. It begins with the title "Le code des opérations" and contains 5 math problems with the corresponding solutions shown. The problems include addition, subtraction, multiplication and order of operations. The document provides the work and answers to calculating 27 + 94 + 73, 20 - 13 + 3, 2.5 x 3.7 x 4, 30 + 7 x 4, and 6 x 7 - 5 x 4.

1. Calcul mental
N°14
“Le code des opérations”

2. 27 + 94 + 73
Diapositive 1Diapositive 1

4. 20 - 13 + 3
Diapositive 2Diapositive 2

6. 2,5 × 3,7 × 4
Diapositive 3Diapositive 3

8. 30 + 7 × 4
Diapositive 4Diapositive 4

10. Diapositive 5Diapositive 5
6 × 7 - 5 × 4

12. FIN

13. CORRECTION

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

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

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

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

18. Diapositive 5Diapositive 5
6 × 7 - 5 × 4
= 42 - 20 = 22