Odpowiedź:
B)
1/4 - 1/2= 1/4 - 2/4= 1/4 + (-2/4)= -1/4
-7/12 + 3/8 = -14/24 + 9/24 = -5/24
-3 i 1/5 - 2 i 1/2 = -3,2 + (-2,5) = -5,7
1 i 1/6 - (-2 i 1/12) = 1 i 2/12 + 2 i 1/12 = 3 i 3/12 = 3 i 1/4
C)
3,7 - 4 i 2/5 = 3,7 + (-4,4) = -0,7
-7/8 + (-0,7) = -7/8 + (-7/10) = -35/40 + (-28/40) = -63/40 = -1 i 23/40
1,4 - (-1 i 3/4) = 1,4 + 1 i 3/4 = 1 i 4/10 + 1 i 3/4 = 1 i 8/20 +1 i 15/20 = 2 i 23/29 = 3 i 3/20
-2 i 1/6 - (-1,6) = -2 i 1/6 + 1,6 = -2 i 1/6 + 1 i 6/10 = -2 i 5/30 + 1 i 48/30 = -0 i 17/30
