Odpowiedzi

2009-10-22T18:18:40+02:00
A)
-5⁴/₇ + 7=
= -5⁴/₇ + 6⁷/₇=
= 1³/₇

b)
1,23 - 9=
= -9+1,23= - 7, 77

c) (- i - daje +)
-6 - (-4 ⁵/₉)=
= -6 + 4⁵/₉=
= -5⁹/₉ + 4⁵/₉=
= - 1⁴/₉