1*100
=1+(1+1)+(1+2)+(1+3)+â¦â¦+ï¼1+100-1ï¼
=1+2+3+4+â¦â¦+100
=ï¼1+100ï¼Ã100÷2
=101Ã50
=5050
注ï¼è¿å¯ä»¥è¿æ ·
1*100
=1+(1+1)+(1+2)+(1+3)+â¦â¦+ï¼1+100-1ï¼
=1+2+3+4+â¦â¦+100
=ï¼1+100ï¼+ï¼2+99ï¼+ï¼3+98ï¼+â¦â¦+ï¼49+52ï¼+ï¼50+51ï¼
=101Ã50 ï¼å ±50个101ï¼
=5050
æ¨å¥½ï¼âyzwbæç±æ家âå¾é«å ´ä¸æ¨å ±åæ¢è®¨è¯¥é®é¢ã
å¦ææ¬é¢æä»ä¹ä¸æç½å¯ä»¥è¿½é®ï¼å¦æ满æ请ç¹å»âé纳为满æåçâ
å¦ææå ¶ä»é®é¢è¯·é纳æ¬é¢åå¦åç¹å»åææ±å©ï¼çé¢ä¸æï¼è¯·è° 解ï¼è°¢è°¢ã
ç¥ä½ å¼å¿