Slt aider moi svp cest pour demain

Réponses

• Réponse publiée par: kekemkn

  Bonjour

  Explications étape par étape

  A =3/2 + 4/5

  A = 15/10 + 8/10

  A = 23/10

  B = 13/15 - 3/5

  B = 13/15 - 9/15

  B = 4/15

  C = 35/4 * (-28)/5

  C = 7*5*(-7)*4/4*5

  C = -49

  D = 7/10 : 3/5

  D = 7/10 * 5/3

  D = 7 * 5/5 * 2 * 3

  D = 7/6

  E = (12/7 + 8/7) * 4/5

  E = 20/7 * 4/5

  E = 5 * 4 * 4 / 7 * 5

  E = 16/7

  F = 5/8 * (3/4 + 7/4)

  F = 5/8 * 10/4

  F = 5 * 5 * 2/8 * 2 * 2

  F = 25/16

  G = 7 * (3 + 5/7)

  G = 7 * (21/7 + 5/7)

  G = 7 * 26/7

  G = 26*7/7

  G = 26

  H = (1/2 + 3/4) : 2/3

  H = (2/4 + 3/4) : 2/3

  H = 5/4 : 2/3

  H = 5/4 * 3/2

  H = 15/8

  I = (12/7 + /8/7) : (7/5 - 1/5)

  I = 20/7 : 6/5

  I = 20/7 *  5/6

  I = 2 * 10 * 5 / 7 * 3 * 2

  I = 50/21

  J = 1 - (1/6 + 5/12)

  J = 1 - (2/12 + 5/12)

  J = 1 - 7/12

  J = 12/12 - 7/12

  J = 5/12

  K = 2/3 * 7/5 - 4/15

  K = 14/15 - 4/15

  K = 10/15

  K = 5 * 2/5 * 3

  K = 2/3

  L = 3/4 : 4/5 + 7/2

  L = 3/4 * 5/4 + 7/2

  L = 15/16 + 7/2

  L = 15/16 + 56/16

  L = 71/16

  M = 1/2 + 5/2 * 7/10

  M = 1/2 + 35/20

  M = 10/20 + 35/20

  M = 45/20

  M = 9 * 5/4 * 5

  M = 9/4

  N = 4/7 + 15/7 : 5/2

  N = 4/7 + 15/7 * 2/5

  N = 4/7 + 30/35

  N = 20/35 + 30/35

  N = 50/35

  N = 5 * 10/5 * 7

  N = 10/7

  O = 1 - 5/2 * 4/15

  O = 1 - 20/30

  O = 30/30 - 20/30

  O = 10/30

  O = 1/3

  P = 2/7 + 5/14 * (2/3 + 1/3)

  P = 2/7 + 5/14 * 1

  P = 2/7 + 5/14

  P = 4/14 + 5/14

  P = 9/14
• Réponse publiée par: fleaugdc29

  Explications étape par étape :

  ■ A = 23/10 = 2,3

     B = 4/15

     C = - 49

     D = 35/30 = 7/6 .

     E = 16/7

     F = 50/32 = 25/16 .

     G = 26

     H = 15/8 = 1,875

      I = (20/7) x (5/6) = 100/42 = 50/21 .

     J = 1 - (7/12) = 5/12 .

     K = 10/15 = 2/3 .

     L = (15/16) + (7/2) = (15/16) + (56/16) = 71/16 .

     M = (1/2) + (7/4) = 9/4 .

     N = 10/7

  remarque :

  si Tu es convenable en calcul mental,

  la calculatrice n' est pas indispensable !

     O = 1 - (2/3) = 1/3 .    

     P = 9/14
• Réponse publiée par: micmac35

  Les droites son sécantes