如题所述
58X101
=58X(100+1)
=58X100+58
=5800+58
=5858
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=58X(100+1)
=58X100+58
=5800+58
=5858
å¸æå¯¹ä½ æ帮å©ï¼æ»¡æ请åæ¶é纳ï¼
ä½ çé纳æ¯æåççå¨åï¼
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