Cabé A = 3/7 - (2/7*21/8) A = 3/7 - (42/56) A = 24/56 - 42/56 A = - 18/56 A =- 9/28
B = (3-2/3) / (4/3*7) B = (9/3-2/3) / (4/3*7) B = (7/3) / 28/3) B = 7/3 *3/28 B = 21/84 B = 3*7 / 2*2*3*7 B = 1/4 C = (5/8+3/2) * 3/2 C = (5/8 + 12/8) * 3/2 C = 17/8 * 3/2 C = 51/16
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A = 3/7 - (42/56)
A = 24/56 - 42/56
A = - 18/56
A =- 9/28
B = (3-2/3) / (4/3*7)
B = (9/3-2/3) / (4/3*7)
B = (7/3) / 28/3)
B = 7/3 *3/28
B = 21/84
B = 3*7 / 2*2*3*7
B = 1/4
C = (5/8+3/2) * 3/2
C = (5/8 + 12/8) * 3/2
C = 17/8 * 3/2
C = 51/16