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Bonjour

Exercice 1 :

Nombre x | 4/3 | -7/5 | ... | ... | ...

Inverse x...| ...... | ....... | 6 | -7 | ...

Opposé x | ....... | .......| ... | .... | 8/9

L’inverse de x : 1/x

L’opposé de x : -x

Nombre x | 4/3 | -7/5 | 1/6 | -1/7 | -8/9

Inverse x...| 3/4 | -5/7 | 6 | -7 | -9/8

Opposé x | -4/3 | 7/5 | -1/6 | 1/7 | 8/9

Exercice 2 :

Calculer :

A = 1/5 : 5

A = 1/5 x 1/5

A = 1/25

B = 2/3 : 1/3

B = 2/3 x 3

B = 3/3 x 2

B = 2

C = 3/-7 : -1/7

C = -3/7 x -7

C = 3 x 7/7

C = 3

D = -8 : 1/8

D = -8 x 8

D = -64

Exercice 3 :

Calculer :

A = 11/5 : (-3)

A = 11/5 x (-1/3)

A = -11/15

B = (-3) : 11/5

B = -3 x 5/11

B = -15/11

C = 5/6 : 6/5

C = 5/6 x 5/6

C = 25/36

D = 2/-3 : -5/7

D = -2/3 x -7/5

D = 14/15