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573+1.299+427
asosiatif
(427+1.299)+573
b. komutatif
750+248+1.250
asosiatif
(1.250+248)+750
c. komutatif
4×23×25
asosiatif
25×(23×4)
d. komutatif
125×7×8
asosiatif
8×(7×125)