从1写到20，可以怎样写，3个3个地写，5个5个地写？ 从1到20里面,2个2个数或5个5个地数,都能数到的数有几个...
\u4ece1\u5199\u523020\uff0c5\u4e2a5\u4e2a\u6570\u7684\u6570\u600e\u4e48\u5199\uff1f\u4e00\u5230\u5341\u6709\u4e00\u4e2a\u4e94\uff0c\u5341\u5230\u4e8c\u5341\u6709\u4e00\u4e2a\u5341\u4e94\uff0c\u4ee5\u6b64\u7c7b\u63a8\uff0c\u4e00\u5230\u4e00\u767e\u6709\u5199\u4e86,\u5341\u4e00\u4e2a\u6570\u5b57\u4e94\uff0855\u542b\u4e24\u4e2a5\uff09\uff0c\u5206\u522b\u4e3a5,15,25,35,45,55,65,75,85,95\uff0c\u4ece101\u5230200\u4e5f\u670911\u4e2a\u6570\u5b575\uff0c\u800c555\u6709\u4e09\u4e2a5\uff0c\u5219\u540c\u7406\u4ece1\u5230700\u6709\uff0c11*7+1=78\u4e2a\u6570\u5b575.
1-20\u4e2d\uff0c\u4e00\u5171\u670920\u4e2a\u6570\u3002
2\u4e2a2\u4e2a\u7684\u6570\u7684\u8bdd\uff0c\u5f97\u5230\u7684\u90a3\u4e2a\u6570\u80af\u5b9a\u662f2\u7684\u500d\u6570\uff0c\u4e5f\u5c31\u662f\u4e00\u4e2a\u5076\u6570\u3002
\u6bd4\u5982\u8bf42\uff0c4\uff0c6\uff0c8\uff0c10\uff0c12\uff0c14\uff0c16\uff0c18\uff0c20\u3002
\u4e5f\u5c31\u662f\u8fd9\u5341\u4e2a\u6570\u636e\uff0c5\u4e2a5\u4e2a\u7684\u6570\uff0c\u90a3\u80af\u5b9a\u5c31\u662f5\u7684\u500d\u6570\uff0c\u6bd4\u5982\u8bf45\uff0c10\uff0c15\uff0c20\u3002
\u6570\u636e\u6bd4\u8f83\u5c11\u53ea\u67094\u4e2a\uff0c\u5bf9\u6bd4\u4e00\u4e0b\uff0c\u53d1\u73b0\u90fd\u80fd\u6570\u5230\u7684\u662f10\uff0c20\u3002\u5176\u5b9e\u901a\u8fc7\u6211\u4eec\u524d\u9762\u7684\u5206\u6790\uff0c\u90fd\u80fd\u6570\u5230\u7684\u6570\u503c\u6709\u4e00\u4e2a\u7279\u70b9\uff0c\u4ed6\u80af\u5b9a\u662f2\u7684\u500d\u6570\uff0c\u540c\u65f6\u4e5f\u662f5\u7684\u500d\u6570\uff0c\u4e5f\u5c31\u662f2\u548c5\u7684\u516c\u500d\u6570\uff0c\u57281-20\u4e2d\u3002\u53ea\u670910\u548c20\u662f\u4e8c\u8005\u7684\u516c\u500d\u6570\uff0c\u6240\u4ee5\u5c31\u662f\u4ed6\u4fe9\uff0c\u6240\u4ee5\u662f\u67092\u4e2a\u3002
\u5047\u8bbe\u4ee5\u540e\u9047\u5230\u5176\u4ed6\u7684\uff0c\u6bd4\u59823\u4e2a3\u4e2a\u7684\u6570\uff0c4\u4e2a4\u4e2a\u7684\u6570\uff0c\u90fd\u80fd\u6570\u5230\u7684\u5c31\u662f3\u548c4\u7684\u516c\u500d\u6570\uff0c\u4e5f\u5c31\u662f12\u3002\u5c31\u8fd9\u4e00\u4e2a\u3002
\u7279\u5f81
\u6ce8\uff1a\u4ee5\u4e0b\u7279\u5f81\u662f\u5c31\u6574\u6570\u7684\u5341\u8fdb\u5236\u8868\u793a\u6cd5\u800c\u8a00\u3002
2\u7684\u500d\u6570
\u4e00\u4e2a\u6570\u7684\u672b\u5c3e\u662f\u5076\u6570\uff080\uff0c2\uff0c4\uff0c6\uff0c8\uff09\uff0c\u8fd9\u4e2a\u6570\u5c31\u662f2\u7684\u500d\u6570\u3002
\u59823776\u30023776\u7684\u672b\u5c3e\u4e3a6\uff0c\u662f2\u7684\u500d\u6570\u30023776\u00f72=1888
3\u7684\u500d\u6570
\u4e00\u4e2a\u6570\u7684\u5404\u4f4d\u6570\u4e4b\u548c\u662f3\u7684\u500d\u6570\uff0c\u8fd9\u4e2a\u6570\u5c31\u662f3\u7684\u500d\u6570\u3002
4926\u3002(4+9+2+6)\u00f73=7\uff0c\u662f3\u7684\u500d\u6570\u30024926\u00f73=1642
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绛旓細浠庢暟瀛1鍐欏埌20锛澶х害瑕佺敤15绉掔殑鏃堕棿銆傛椂闂村崟浣嶇锛坰econd锛夋槸鍥介檯鍗曚綅鍒朵腑鏃堕棿鐨勫熀鏈崟浣嶏紝绗﹀彿鏄痵銆傛湁鏃朵篃浼氬熺敤鑻辨枃缂╁啓鏍囩ず涓簊ec.銆傜鐨勫畾涔夛細褰撻摨-133鍘熷瓙澶勪簬闈炴壈鍔ㄥ熀鎬佹椂涓や釜瓒呯簿缁嗚兘绾ч棿璺冭縼瀵瑰簲鐨勮緪灏勯鐜囄斘紺s浠z(鍗崇瓑浜巗-1)涓哄崟浣嶈〃杈炬椂閫夊彇鍥哄畾鏁板9192631770鍊嶆潵瀹氫箟绉掋傝秺绠鍗曠殑鏁板瓧鍐...
绛旓細寰堥珮鍏翠负浣犺В鍐抽棶棰锛屼竴涓暟瀛1绉锛1-9闇瑕9绉掞紝10-20闇瑕22绉掞紝鎬诲叡闇瑕31绉掋傜锛宮iao锛岀鑺掍篃銆傜鏈夌銆傜鍒嗚岀瀹氥傜鑺掓洶绉掋傜姽鏈ㄦ湯鏇版潽銆傜鑺掍篃銆傛槬鍒嗚岀鐢燂紝澶忚嚦鏅锋櫙鍙害銆傜鏈夌锛岀鍒嗚岀瀹氥--銆婅鏂囥(1) 褰㈠０銆備粠绂,灏戝０銆傛湰涔:绂捐姃銆(2) 鍚屾湰涔 [beard of corn or ...
绛旓細浠庢暟瀛1鍐欏埌20,澶х害瑕佺敤15绉掔殑鏃堕棿銆傛椂闂村崟浣嶇锛坰econd锛夋槸鍥介檯鍗曚綅鍒朵腑鏃堕棿鐨勫熀鏈崟浣嶏紝绗﹀彿鏄痵銆傛湁鏃朵篃浼氬熺敤鑻辨枃缂╁啓鏍囩ず涓簊ec.銆傜鐨勫畾涔夛細褰撻摨-133鍘熷瓙澶勪簬闈炴壈鍔ㄥ熀鎬佹椂涓や釜瓒呯簿缁嗚兘绾ч棿璺冭縼瀵瑰簲鐨勮緪灏勯鐜囄斘紺s浠z(鍗崇瓑浜巗-1)涓哄崟浣嶈〃杈炬椂閫夊彇鍥哄畾鏁板9192631770鍊嶆潵瀹氫箟绉掋傛椂闂村崟浣 绉掓槸...
绛旓細涓鍒板崄鏈変竴涓簲锛屽崄鍒浜屽崄鏈変竴涓崄浜旓紝浠ユ绫绘帹锛屼竴鍒颁竴鐧炬湁鍐欎簡,鍗佷竴涓暟瀛椾簲锛55鍚袱涓5锛夛紝鍒嗗埆涓5,15,25,35,45,55,65,75,85,95锛屼粠101鍒200涔熸湁11涓暟瀛5锛岃555鏈涓変釜5锛屽垯鍚岀悊浠1鍒700鏈夛紝11*7+1=78涓暟瀛5.
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