40/45 = 8x5/ 9x5 = (tu barre les 5) =8/9
5/35 = 1x5 / 7x5 = 1/7
= 1x2/2x4 = 1/4
2/20 = 2x1 / 10 x2= 1/10
3/21 = 3x1/3x7= 1/7
20/32= 4x5/4x8 = 5/8
6/14= 2x3/2x7= 3/7
28/40=4x7/4x10= 7/10
2/18= 2x1/2x9= 1/9
24/28= 4x6/4x7= 6/7
4/6 = 2x2/2x3= 2/3
12/27= 3x4/3x9= 4/9
20/32= 4x5/4x8= 5/8
22/24=2x11/2x12= 11/12
4/48= 4x1/4x12= 1/12
4/8= 4x1/4x2= 1/2
2/4=2x1/2x2= 1/2
2/8=2x1/2x4 = 1/4
15/27=3x5/3x9= 5/9
20/36=4x5/4x9= 5/9
40/45=5x8/5x9= 8/9 il te l'a donné 2 fois celui là
25/35 = 5x5/5x7= 5/7
2/20 = 2x1/2x10= 1/10
12/20=3x4/4x5= 3/5
16/28=4x4/4x7= 4/7
15/27= 3x5/3x9= 5/9 donné 2 fois!!
2/4= 2x1/2x2= 1/2 donné 2 fois!!
10/18=2x5/2x9= 5/9
25/30= 5x5/5x6= 5/6
8/28= 4x2/4x7= 2/7
5/10=5x1/5x2= 1/2
28/36= 4x7/4x9= 7/9
3/21= 3x1/3x7= 1/7
15/35=5x3/5x7=3/7
4/28= 4x1/4x7= 1/7
