Bonjour à tous est ce que quelqu’un pourrez m’aider pour les exercices 35 et 36 merci d’avance

Bonjour,

35)

10 x 1/2 = 10/2 = 5

1/2 x - 2/5 = - 2/10 = - 1/5

- 2/5 x 3/2 = - 6/10 = - 3/5

5 x - 1/10 = - 5/10 = - 1/5

- 1/5 x - 3/5 =  3/25

5 x - 1/5 = - 5/5 = - 1

- 1 x - 3/25 = 3/25

                        3/25

                - 1          3/25

           5        - 1/5      - 3/5

      10     1/2        - 2/5          3/2

36)

a. - 2/5 x - 5/2 = 10/10 = 1

b. 4/3 x - 3/2 = - 12/6 = - 6.

Réponse :

Explications étape par étape

Bonjour

Exercice 35 :

..........| F |

..... | D...|..E....|

...| A | .B. | . C . |

10 | 1/2 | -2/5 | 3/2

A = 10 x 1/2

A = 10/2

A = 5

B = 1/2 x -2/5

B = 2/2 x -1/5

B = -1/5

C = -2/5 x 3/2

C = 2/2 x -3/5

C = -3/5

D = 5 x -1/5

D = -1 x 5/5

D = -1

E = -1/5 x -3/5

E = 3/25

F = -1 x 3/25

F = -3/25

........| -3/25 |

..... | -1 .|..3/25.|

...| 5 | -1/5 | -3/5 |

10 | 1/2 | -2/5 | 3/2

Exercice 36 :

-2/5 x -5/2 = 2/2 x 5/5 = 1

4/3 x -3/2 = 3/3 x -4/2 = -4/2 = -2

1/2 x 8/5 x 10/4 = 1/2 x 8/4 x 10/5 = 1/2 x 2 x 2 = 2/2 x 2 = 2

-5/6 x 12/5 x 11/2 = -12/6 x 5/5 x 11/2 = -2 x 11/2 = 2/2 x -11 = -11