Odpowiedź:
z1
a) 1 4/11 + 9/11 = 1 13/11 = 2 2/11
b) 1 3/8 + 2 1/3 = 11/8 + 7/3 = 33/24 + 56/24 = 89/24 = 3 17/24
c) 1 3/13 - 9/13 = 16/13 - 9/13 =7/13
d) 7 7/8 - 2 3/4 = 63/8 - 11/4 = 63/8 - 22/8 = 41/8 = 5 1/8
z2
a)1 3/5 + 1/7 = 8/5 + 1/7 = 56/35 + 5/35 = 61/35 = 1 26/35
b)1 3/4 + 2 2/3 = 7/4 + 8/3 = 21/12 + 32/12 = 53/12 = 4 5/12
c)3 3/4 - 1 2/5 = 15/4 - 7/5 = 75/20 - 28/20 = 55/20 = 2 15/20 = 2 3/4
d)4 1/6 - 2 2/3 = 25/6 - 8/3 = 25/6 - 16/6 = 9/6 = 1 1/2
