Odpowiedź:
-1 2/3 + 2 1/2 = -1 4/6 + 2 3/6 = - 10/6 + 15/6 = 5/6
1 1/4-2 2/3 = 1 3/12 - 2 8/12 = 15/12-30/12 = -15/12
5/13•65/70=1/13•65/12=65/195= 11/39
-14/15•10/7=-2/3•2/1=-4/3= -1 1/3
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Odpowiedź:
-1 2/3 + 2 1/2 = -1 4/6 + 2 3/6 = - 10/6 + 15/6 = 5/6
1 1/4-2 2/3 = 1 3/12 - 2 8/12 = 15/12-30/12 = -15/12
5/13•65/70=1/13•65/12=65/195= 11/39
-14/15•10/7=-2/3•2/1=-4/3= -1 1/3