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Grupeaza convenabil factori si rezolva: 2×8×3;9×1×6; 4×8×2; 7×2×5

Răspuns :

2x8x3=2x3x8=6x8=48
9x1x6=9x6=54
4x8x2=4x2x8=8x8=64
7x2x5=7x10=70