Bonjour,
27/12 + 5/4 = 9/4 + 5/4 = 13/4
56/24 - 2/3 = (8 x 7) / (8 x 3) - 2/3 = 7/3 - 2/3 = 5/3
3/7 + 12/21 = 3/7 + (3 x 4) / (3 x 7) = 3/7 + 4/7 = 7/7 = 1
11/8 - 22/16 = 11/8 - (2 x 11) / (2 x 8) = 11/8 - 11/8 = 0.
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Bonjour,
27/12 + 5/4 = 9/4 + 5/4 = 13/4
56/24 - 2/3 = (8 x 7) / (8 x 3) - 2/3 = 7/3 - 2/3 = 5/3
3/7 + 12/21 = 3/7 + (3 x 4) / (3 x 7) = 3/7 + 4/7 = 7/7 = 1
11/8 - 22/16 = 11/8 - (2 x 11) / (2 x 8) = 11/8 - 11/8 = 0.