1)
A = 1 - (8/12 + 3/12) = 1 - 11/12 = 12/12 - 11/12 = 1/12
et
B = 25/6 x (4/10-3/10) = 25/6 x 1/10 = (25x1) / (6x10)
= (5x5) / (6x2x5) = 5/12
2) 4/5 de 35/8 = 4/5 x 35/8 = (4x35)/(5x8) = (4x7x5)/(5x4x2) = 7/2
3) 1/12 + 5/12 + 7/2 = (1+5+42)/12 = 4
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1)
A = 1 - (8/12 + 3/12) = 1 - 11/12 = 12/12 - 11/12 = 1/12
et
B = 25/6 x (4/10-3/10) = 25/6 x 1/10 = (25x1) / (6x10)
= (5x5) / (6x2x5) = 5/12
2) 4/5 de 35/8 = 4/5 x 35/8 = (4x35)/(5x8) = (4x7x5)/(5x4x2) = 7/2
3) 1/12 + 5/12 + 7/2 = (1+5+42)/12 = 4