Vous pouvez m'aider à faire l'exercice ci-dessous? (le 62) Merci d'avance.

Bonjour,

A = 2 +        8___

              9 + 5/19

A = 2 +                 8_________

            (9 x 19) / (1 x 19) + 5/19

A = 2 +      8

        171/19 + 5/19

A = 2 + 8 : 176/19

A = 2 + 8 x 19/176

A = 2 + 152/176

A = (2 x 22) / (1 x 22) + (8 x 19) / (8 x 22)

A = 44/22 + 19/22

A = 63/22

B = 1 + 1/8 + 3/4 - 1/12

           5/6 + 1/3 + 2

B = 1 + [(1 x 3) / (8 x 3) + (3 x 6) / (4 x 6) - (1 x 2) / (12 x 2)]

                    [5/6 + (1 x 2) / (3 x 2) + (2 x 6) / (1 x 6)]

B = 1 + 3/24 + 18/24 - 2/24

             5/6 + 2/6 + 12/6

B = 1 + 19/24 : 19/6

B = 1 + 19/24 x 6/19

B = 1 + 114/456

B = (1 x 4) / (1 x 4) + (114 x 1) / (114 x 4)

B = 4/4 + 1/4

B = 5/4

C =    5/12__

 7/3 x 8/15 - 5/6

C =    5/12

    56/45 - 5/6

C =                  5/12____________

(56 x 6) / (45 x 6) - (5 x 45) / (6 x 45)

C =         5/12__

    336/270 - 225/270

C = 5/12 : 111/270

C = 5/12 x 270/11

C = 1350/132

C = (6 x 225) / (6 x 22)

C = 225/22.