Pourquoi qd on demande de la aide il faut assumer que des copains recopient aussi,exo posté sur nd=reponse sur nd
7/30 + 3/5 = 7/30 + 18/30 = 25/30 = 5/6
4/9 + 2/45 = 20/45 + 2/45 = 22/45
5/15 + 4/3 = 5/15 + 20/15 = 25/15 = 5/3
6/7 + 1/35 = 36/35+1/35 = 37/35
1/5 -2/25 = 5/5 - 2/25 =3/25
4/15 - 7/30 = 8/30 - 7/30 = 1/30
5/2 - 17/8 = 20/8 - 17/8 =3/8
5/16 + 7/4 = 5/16 + 28/16 = 33/16
2/21 + 5/7 = 2/21+ 15/27 = 17/21
8/3 + 3/27 = 72/27 + 3/27 = 75/27 = 25/9
7/42 - 1/6 = 1/6 - 1/6 =0
13/8 + 3/2 = 13/8 + 12/8 = 25/8
2 :
(7*15)/11=105/11
(7*4)/15 = 28/15
(8*14)/21=16/3
(2,3*13)/11=299/110
(4,9*12)/9=98/15
(4*2,7)/25=54/125
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Pourquoi qd on demande de la aide il faut assumer que des copains recopient aussi,exo posté sur nd=reponse sur nd
7/30 + 3/5 = 7/30 + 18/30 = 25/30 = 5/6
4/9 + 2/45 = 20/45 + 2/45 = 22/45
5/15 + 4/3 = 5/15 + 20/15 = 25/15 = 5/3
6/7 + 1/35 = 36/35+1/35 = 37/35
1/5 -2/25 = 5/5 - 2/25 =3/25
4/15 - 7/30 = 8/30 - 7/30 = 1/30
5/2 - 17/8 = 20/8 - 17/8 =3/8
5/16 + 7/4 = 5/16 + 28/16 = 33/16
2/21 + 5/7 = 2/21+ 15/27 = 17/21
8/3 + 3/27 = 72/27 + 3/27 = 75/27 = 25/9
7/42 - 1/6 = 1/6 - 1/6 =0
13/8 + 3/2 = 13/8 + 12/8 = 25/8
2 :
(7*15)/11=105/11
(7*4)/15 = 28/15
(8*14)/21=16/3
(2,3*13)/11=299/110
(4,9*12)/9=98/15
(4*2,7)/25=54/125