Odpowiedź:
a)
1/2 + 1 5/6 = 3/6 + 1 5/6 = 1 8/6 = 2 2/6 = 2 1/3
2/3 + 1 5/6 = 4/6 + 1 5/6 = 1 9/6 = 2 3/6 = 2 1/2
2 1/12 + 1 5/6 = 2 1/12 + 1 10/12 = 3 11/12
1 3/4 + 1 5/6 = 1 9/12 + 1 10/12 = 2 19/12 = 3 7/12
1 1/5 + 1 5/6 = 1 6/30 + 1 25/30 = 2 31/30 = 3 1/30
2 7/8 + 1 5/6 = 2 21/24 + 1 20/24 = 3 41/24 = 4 17/24
3 4/9 + 1 5/6 = 3 8/18 + 1 15/18 = 4 23/18 = 5 5/18
b)
1 9/10 - 3/5 = 1 9/10 - 6/10 = 1 3/10
2 1/15 - 3/5 = 1 16/15 - 9/15 = 1 7/15
1 1/3 - 3/5 = 4/3 - 3/5 = 20/15 - 9/15 = 11/15
3/4 - 3/5 = 15/20 - 12/20 = 3/20
4 1/2 - 3/5 = 4 5/10 - 6/10 = 3 15/10 - 6/10 = 3 9/10
5 7/20 - 3/5 = 4 27/20 - 12/20 = 4 15/20 = 4 3/4
1 3/7 - 3/5 = 1 15/35 - 21/35 = 50/35 - 21/35 = 29/35
Szczegółowe wyjaśnienie:
