Réponses

  • Utilisateur Brainly
2014-09-03T18:43:35+02:00
A= 3/5 + 6/5
A= 9/5

B= 5/12 + 4/3
B= 5/12 + (4*4)/(3*4)
B= 5/12 + 16/12
B= 21/12

C= 5/18 + 1/12
C= 10/36 + 3/36
C= 13/36

D= 3/5 - 6/5
D= - 3/5

E= 7/4 - (- 3/2)
E= 7/4 + 6/4
E= 11/4

F= - 4/3 - 4/5
F= - (4*5)/(3*5) - (4*3)/(5*3)
F= - 20/15 - 12/15
F= - 32/15
2014-09-03T19:16:06+02:00
Bonsoir,

A= 3/5 + 6/5 =
A= 9/5

B= 5/12 + 4/3
B= 5/12 + 3*4/3*4
B= 5/12 + 12/12
B= 17/12

C= 5/18 + 1/12 = 10/36 + 3/36
C= 13/36

D= 3/5 - 6/5
D= -3/5

E= 7/4 - (-3/2)=
E= 7/4 + 6/4
E= 11/4

F= -4/3 - 3/5
F= 4*5/3*5 - 4*3/5*3
F= 20/15 - 12/15
F=8/15

bonne soirée