Bonsoir,
1/2 1/5
23/45 1/3 19/90
47/90 2/9
à trouver:
1/2 + 1/3 + 2/9
= 9/18 + 6/18 + 4/18 = 19/18
19/18 - 1/3 - 1/5
= 19/18 - 6/18 -1/5
= 13/18 -1/5
=65/90 - 18/90 = 47/90
19/18 - 1/2 - 47/90
= 95/90 - 2/90 -47/90 = 46/90 = 23/45
19/18 -23/45 -1/3
= 95/90 - 46/90 - 30/90
= 19/90
Etc...
19/18 - 1/2 -1/5
19/18 - 47/90- 2/9
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Bonsoir,
1/2 1/5
23/45 1/3 19/90
47/90 2/9
à trouver:
1/2 + 1/3 + 2/9
= 9/18 + 6/18 + 4/18 = 19/18
19/18 - 1/3 - 1/5
= 19/18 - 6/18 -1/5
= 13/18 -1/5
=65/90 - 18/90 = 47/90
19/18 - 1/2 - 47/90
= 95/90 - 2/90 -47/90 = 46/90 = 23/45
19/18 -23/45 -1/3
= 95/90 - 46/90 - 30/90
= 19/90
Etc...
19/18 - 1/2 -1/5
19/18 - 47/90- 2/9