This document is a series of math problems involving relative numbers. It presents 5 math problems across different slides, showing an expression with a question mark that needs to be solved. The final slide provides the corrections to the 5 problems, showing the calculations and solutions.

1. Calcul mental
“Les nombres relatifs”
Série n°1

2. Diapositive 1
10 - 2 x 4

4. Diapositive 2
? x (- 5) = 45

6. Diapositive 3
? x 5 = 11

8. Diapositive 4
27: ? =- 3

10. Diapositive 5
- 13:(- 5)

12. CORRECTION

13. FIN

14. Diapositive 1
10 - 2 x 4
=10-8= 2

15. Diapositive 2
- 9 x(-5)
= 45

16. Diapositive 3
2,2 x 5
= 11

17. Diapositive 4
27:(-9) = -3

18. Diapositive 5
-13 : (- 5 )
= 2,6