ALORS JE DOIT FAIRE CA POUR DEMAIN (fraction): EXERCICE 1 1) Effectue ces 2 calculs : 17/7 - 9/7 = ....                 2) 18/11 + 2/11 + 1/11 = ... EXERCICE 2

Exercice 1:

1) 17/7 - 9/7
= (17-9) / 7
= 8/7

2) 18/11 + 2/11 + 1/11
= (18 + 2 + 1) / 11
= 21/11

Exercice 2:

A= 13/15 + 4/5
A= 13/15 + 4x3 / 5x3
A= 13/15 + 12/15
A= (13 + 12) / 15
A= 25/15
A= 5x5 / 5x3
A= 5/3

B= 5/14 - 2/7
B= 5/14 - 2x2 / 7x2
B= 5/14 - 4/14
B= (5 - 4) / 14
B= 1/14

C= 5/2 + 7/6 + 8/3
C= 5x3 / 2x3 + 7/6 + 8x2 / 3x2
C= 15/6 + 7/6 + 16/6
C= (15 + 7 + 16) / 16
C= 38/16
C= 2x19 / 2x8
C= 19/8

D= 7/2 + 5/6
D= 7x3 / 2x3 + 5/6
D= 21/6 + 5/6
D= (21 + 5) / 6
D= 26/6
D= 2x13 / 2x3
D= 13/3

Exercice 1:

17/7 - 9/7 = 8/7

18/11 + 2/11 + 1/11 = 21/11

Exercice 2:

A= 13/15 +4/5
A= 13/15 + 12/15
A= 25/15A= 5/3

B= 5/14 -2/7
B= 5/14 - 4/14 
B= 1/14

C= 5/2 + 7/6 + 8/3
C= 15/6 + 7/6 + 16/6
C= 38/6
C= 19/3

D= 7/2 + 5/6 D= 21/6 + 5/6
D= 26/ 6 
D= 13/3

Voilà ! J'espère t'avoir aidé(e) ! :)