Odpowiedzi

2010-03-22T21:34:14+01:00
2010-03-22T21:34:41+01:00
(-9)*(-1/2) = 9/2 = 4 1/2 = 4,5
2010-03-22T21:36:04+01:00
(-9) ÷ (-½) = 9 ÷ 0,5 = 4,5