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60 = 2 kuadrat x 3 x 5
FPB = 2 kuadrat x 5 = 20
2. 40 = 2 kubik x 5
70 = 2 x 5 x 7
KPK = 2 kubik x 5 x 7 = 280
3. 2,5 : 1/4 x 75 % = 2,5 : 0,25 x 0,75 = 7,5