This document contains a series of math problems involving relative numbers. The problems include subtracting 7 from 7 multiplied by 2, dividing -9 by 5, multiplying -9.8 by 10 and 4.6 by 5, and dividing 32 by -8. The corrections provided show the step-by-step work and solutions to each problem.

1. Calcul mental
N°12
“Les nombres relatifs”

2. 7 - 7 x 2
Diapositive 1Diapositive 1

4. - 9 : 5
Diapositive 2Diapositive 2

6. ? x 10 = -98
Diapositive 3Diapositive 3

8. ? x 5 = 23
Diapositive 4Diapositive 4

10. 32 : ?=- 4
Diapositive 5Diapositive 5

12. FIN

13. CORRECTION

14. 7 - 7 x 2
=7-14= -7
Diapositive 1Diapositive 1

15. -9 : 5
= - 1,8
Diapositive 2Diapositive 2

16. - 9,8 x10
= - 98
Diapositive 3Diapositive 3

17. 4,6 x 5
= 23
Diapositive 4Diapositive 4

18. 32:(-8) = -4
Diapositive 5Diapositive 5