Bonjour,
A = 2/7 - 3/7 x 14/9
A = 2/7 - 42/63
A = (2 x 9) / (7 x 9) - 42/63
A = 18/63 - 42/63
A = (21 x 2) / (21 x - 3)
A = - 2/3
B = 7/8 x (2/3 - 1)
B = 7/8 x [2/3 - (1 x 3) / (1 x 3)]
B = 7/8 x (2/3 - 3/3)
B = 7/8 x - 1/3
B = - 7/24
C = 4/5 x 1/4 + 2/5
C = 4/20 + (2 x 4) / (5 x 4)
C = 4/20 + 8/20
C = 12/20
C = (4 x 3) / (4 x 5)
C = 3/5.
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Bonjour,
A = 2/7 - 3/7 x 14/9
A = 2/7 - 42/63
A = (2 x 9) / (7 x 9) - 42/63
A = 18/63 - 42/63
A = (21 x 2) / (21 x - 3)
A = - 2/3
B = 7/8 x (2/3 - 1)
B = 7/8 x [2/3 - (1 x 3) / (1 x 3)]
B = 7/8 x (2/3 - 3/3)
B = 7/8 x - 1/3
B = - 7/24
C = 4/5 x 1/4 + 2/5
C = 4/20 + (2 x 4) / (5 x 4)
C = 4/20 + 8/20
C = 12/20
C = (4 x 3) / (4 x 5)
C = 3/5.