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B. -5 : (-4)= 5/4 = 1,25
C. 1 2/3 * (-9,75)= 1 2/3 * (- 9 3/4)= 5/3 * (-39/4)= - 16 3/12= - 16 1/4
D. 1-9/4= 1 - 2 1/4= - 1 1/4 = - 1,25
Przyklad B i C ma inna wartosc