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Activités mentales 3. Prêt Question 1 Calculez -21- (-6) x 8.

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Presentation on theme: "Activités mentales 3. Prêt Question 1 Calculez -21- (-6) x 8."— Presentation transcript:

1 Activités mentales 3

2 Prêt

3 Question 1

4 Calculez -21- (-6) x 8

5 Question 2

6 Calculez -100 – (- 68)

7 Question 3

8 (-6) 2

9 Question 4

10 - 3 4

11 Question 5

12 Calculez 10 6

13 Question 6

14 Calculez 9 - 2 10 5

15 Question 7

16 Calculez les 5 de 100 4

17 Question 8

18 Quel nombre convient? … : 9 = -7

19 Question 9

20 Calculez 50 : 0,5

21 Question 10

22 Trouvez x tel que x = 7 2 10

23 Correction

24 1) –21 – ( -6 ) x 8 =-21 +48=27

25 2) –100 –( -68) = -100+68 = -32

26 3) (-6) 2 =36

27 4) – 3 4 = - 3x 3x 3x 3 =-81

28 5) 10 6 = 1 000 000

29 6) 9 - 2 = 9 - 4 = 5 = 1 10 5 10 5 10 2

30 7)Les 5 de 100= 5 x 100 =5x 25 4 4 =125

31 8) –63 car –63 : 9 = -7

32 9) 50 : 0,5 = 50 : 1 = 50 x 2 = 100 2 ou 500 : 5 = 100

33 10) x = 7 2 10 10 x x = 7 x 2 10 x x = 14 x = 14 = 1,4 10


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