Odpowiedź:
b)
4/5 - (1,2 * 5/12 - 0,8) : (-1/8) = 4/5 - (12/10 * 5/12 - 4/5) * (-8) =
= 4/5 - (1/2 - 4/5) * (-8) = 0,8 - (0,5 - 0,8) * (-8) = 0,8 - (-0,3) * (-8) = 0,8 - 2,4 =
= -1,6
c)
(2 2/3 - 25 : 12,5)/[(9 - 6 * 1 1/6) * (-2)] = (2 2/3 - 2)/[(9 - 6 * 7/6) * (-2)] =
= 2/3 : [(9 - 7) * (-2)] = 2/3 : (-2 * 2) = 2/3 : (-4) = -2/3 * 1/4 = -1/6
d)
(4,5 * 1 2/3 - 3,75)/[5/9 - 10/27 : (-5/6)] = (45/10 * 5/3 - 3,75)/(5/9 + 10/27 * 6/5) = (15/2 - 3,75)/(15/27 + 10/27) = (7,5 - 3,75) : 25/27 =
(45/10 * 5/3 - 3,75)/(5/9 + 10/27 * 6/5) = (15/2 - 3,75)/(5/9 + 2/9 * 2) =
= (7,5 - 3,75)/(5/9 + 4/9) = 3,75/1 = 3,75
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Odpowiedź:
b)
4/5 - (1,2 * 5/12 - 0,8) : (-1/8) = 4/5 - (12/10 * 5/12 - 4/5) * (-8) =
= 4/5 - (1/2 - 4/5) * (-8) = 0,8 - (0,5 - 0,8) * (-8) = 0,8 - (-0,3) * (-8) = 0,8 - 2,4 =
= -1,6
c)
(2 2/3 - 25 : 12,5)/[(9 - 6 * 1 1/6) * (-2)] = (2 2/3 - 2)/[(9 - 6 * 7/6) * (-2)] =
= 2/3 : [(9 - 7) * (-2)] = 2/3 : (-2 * 2) = 2/3 : (-4) = -2/3 * 1/4 = -1/6
d)
(4,5 * 1 2/3 - 3,75)/[5/9 - 10/27 : (-5/6)] = (45/10 * 5/3 - 3,75)/(5/9 + 10/27 * 6/5) = (15/2 - 3,75)/(15/27 + 10/27) = (7,5 - 3,75) : 25/27 =
(45/10 * 5/3 - 3,75)/(5/9 + 10/27 * 6/5) = (15/2 - 3,75)/(5/9 + 2/9 * 2) =
= (7,5 - 3,75)/(5/9 + 4/9) = 3,75/1 = 3,75
Szczegółowe wyjaśnienie: