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-3 1/2 - 4,4= -3,5 - 4,4 = -7,9
-7 2/3+3,5= -7 2/3 + 3 1/2 = -7 4/6 + 3 3/6 = -4 1/6
-4,7-(-3 3/8)= -4,7 + 3,375 = -1,325
jesli masz przed nawiasem znak minus, wszystkie liczby w nawiasie zmieniaja znak
-3,5 - 4,4 = -7,9
-7 2/3 + 3 1/2 = -7 4/6 + 3 3/6 = -4 1/6
-4,7 + 3,375 = -1,325