Odpowiedź:
a) 3 7/9 + 2 9/15 = 3 35/45 + 2 27/45 = 5 62/42 = 6 17/45
b) 4 1/3 - 3 7/18 = 4 6/18 - 3 7/18 = 3 24/18 - 3 7/18 = 17/18
c) 6 5/9 - 4 2/45 = 6 25/45 - 4 2/45 = 2 23/45
d) 7 - 3 12/19 = 6 19/19 - 3 12/19 = 3 7/19
e) 6 5/6 - 2 1/7 = 6 35/42 - 2 6/42 = 4 29/42
f) 7 1/9 - 3 7/15 = 7 15/135 - 3 63/135= 6 150/132 - 3 63/135 = 3 87/132
g) 8- 1 1/3 + 2 5/8 = 7 3/3 - 1 1/3 + 2 5/8 = 6 2/3 + 2 5/8 = 6 16/24 + 15/24 = 8 31/24 = 9 7/24
h) 3 7/9 + 2 1/2 - 1 2/3 = 3 14/18 + 2 9/18 - 1 2/3 = 5 23/18 - 1 2/3 = 5 69/54 - 1 36/54 = 4 33/54
i) 25- 1/5 - 1/2 = 24 5/5 - 1/5 - 1/2 = 24 4/5 - 1/2 = 24 8/10 - 5/10 = 24 3/10
j) 66 1/3 - 35 2/7 + 1 1/2 = 66 7/21 - 35 6/21 + 1 1/2 = 31 1/21 + 1 1/2 = 31 2/42 + 1 21/42 = 32 23/42
liczę na naj
