(3×4×5×6)×(1/3-1/4-1/5-1/6)简便算法是什么?
1个回答
原式=(3×4×5×6)×1/3-(3×4×5×6)×1/4-(3×4×5×6)×1/5-(3×4×5×6)×1/6
=120-90-72-60
=-102
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