Odpowiedź:
a) 1 2/8 -4/8 - 3/8 +1 5/8= 10/8- 4/8- 3/8 + 1 5/8= 6/8-3/8+1 5/8 = 3/8+ 1 5/8 = 1 8/8= 2
b) (7 6/10 -2 7/10) - (3 1/4 + 1 2/4) = ( 6 16/10 - 2 7/10) - 4 3/4 = 4 9/10 - 4 3/4 = 4 18/20 - 4 15/20 = 3/20
c) 12 - (2 4/20 + 3 15/20) = 12- 5 19/20= 11 20/20 - 5 19/20 = 6 1/20
