Odpowiedź:
15 i 5/6 + 1 i 1/6 = 16 i 6/6 = 17
5 i 5/12 + 9 i 1/12 = 14 i 6/12 = 14 i 1/2
12 i 7/15 + 12 i 13/15 = 24 i 20/15 = 25 i 5/15 = 25 i 1/3
23 i 13/20 + 31 i 17/20 = 54 i 30/20 = 55 i 10/20 = 55 i 1/2
Odpowiedź:
a) 15 i 5/6 + 1 i 1/6 = 90/6 + 5/6 + 6/6 + 1/6 = 102/6 = 51/3 = 17
b) = 174/12 = 29/2 = 28/2 + 1/2 = 14 + 1/2 (14 całych i 1/2)
c) = 380/15 = 76/3 = 75/3 + 1/3 = 25 + 1/3 (25 całych i 1/3)
d) = 1110/20 = 111/2 = 110/2 + 1/2 = 55 + 1/2 (55 całych i 1/2)
Szczegółowe wyjaśnienie:
a) 15 i 5/6 + 1 i 1/6 = 90/6 + 5/6 + 6/6 + 1/6 = 102/6 = 51/3 = 17
b) 5 i 5/12 + 9 i 1/12 = 60/12 + 5/12 + 108/12 + 1/12 = 174/12 = 29/2 =
= 28/2 + 1/2 = 14 + 1/2 (14 całych i 1/2)
c) 12 i 7/15 + 12 i 13/15 = 180/15 + 7/15 + 180/15 + 13/15 = 380/15 =
= 76/3 = 75/3 + 1/3 = 25 + 1/3 (25 całych i 1/3)
d) 23 i 13/20 + 31 i 17/20 = 460/20 + 13/20 + 620/20 + 17/20 =
1110/20 = 111/2 = 110/2 + 1/2 = 55 + 1/2 (55 całych i 1/2)
