Activités mentales 3

Prêt

Question 1

Calculez -21- (-6) x 8

Question 2

Calculez -100 – (- 68)

Question 3

(-6) 2

Question 4

- 3 4

Question 5

Calculez 10 6

Question 6

Calculez

Question 7

Calculez les 5 de 100 4

Question 8

Quel nombre convient? … : 9 = -7

Question 9

Calculez 50 : 0,5

Question 10

Trouvez x tel que x =

Correction

1) –21 – ( -6 ) x 8 = =27

2) –100 –( -68) = = -32

3) (-6) 2 =36

4) – 3 4 = - 3x 3x 3x 3 =-81

5) 10 6 =

6) = = 5 =

7)Les 5 de 100= 5 x 100 =5x =125

8) –63 car –63 : 9 = -7

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

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