Odpowiedź:
a) 6 1/4 - (3 2/5 - 2 3/20)- 4 3/10 * (1 3/4 + 2 3/20 - 3 9/10) =
= 6 1/4 - (3 8/20 - 2 3/20) - 43/10 * (1 15/20 + 2 3/20 - 3 18/20) =
= 6 1/4 - 1 5/20 - 43/10 * (3 18/20 - 3 18/20) =
= 6 1/4 - 1 5/20 - 43/10 * 0 = 6 5/20 - 1 5/20 - 0 = 5
b) 5 3/4 - 3/4 * ( 4 2/5 - 34/10)- 2 3/8 + (3 3/12 - 1 8/12 ) =
= 5 3/4 - 3/4 * (4 4/10 - 3 4/10) - 2 3/8 + (2 15/12 - 1 8/12) =
= 5 3/4 - 3/4 * 1 - 2 3/8 + 1 7/12 = 5 3/4 - 3/4 - 2 3/8 + 1 7/12 =
= 5 - 2 9/24 + 1 14/24 = 6 14/24 - 2 9/24 = 4 5/24
c) 12 1/5 - (3 5/6 + 2 1/2) + (4 3/10 - 1 2/3) =
= 12 1/5 - (3 5/6 - 1 3/6) + (4 9/30 - 1 20/30) =
= 12 1/5 - 2 2/6 + (3 39/30 - 1 20/30) =
= 12 1/5 - 2 2/6 + 2 19/30 =
= 12 6/30 - 2 10/30 + 2 19/30 =
= 14 15/30 - 2 10/30 = 12 5/30 = 12 1/6
d) 2 5/8 + 6 - (3 1/3 - 1 3/4) + (7 - 3 7/12) =
= 8 5/8 - (3 4/12 - 1 9/12) + (6 12/12 - 3 7/12) =
= 8 5/8 - (2 16/12 - 1 9/12) + 3 5/12 =
= 8 5/8 - 1 7/12 + 3 5/12 =
= 8 5/8 - 1 7/12 + 2 17/12 =
= 8 5/8 + 1 10/12 =
= 8 15/24 + 1 20/24 = 9 35/24 = 10 11/24
Szczegółowe wyjaśnienie:
