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grupeaza convenabil factorii pentru a calcula rapid. 2*47*5= 53*2*5= 2*3*50= 4*43*25=

Răspuns :

2x47x5=53x2x5=2x3x50=4x43x25
2x5x47=2x5x53=2x50x3=4x25x43
10x47=10x53=100x3=100x43
470=530=300=4300