625除以25用简便运算 625÷25的简便计算。1
25x25-625\u9664\u4ee525\u7684\u7b80\u4fbf\u8fd0\u7b97.\u00f725
=25-25
=0
625\u00f725\u7684\u7b80\u4fbf\u8ba1\u7b97\uff1a
625\u00f725
=625\u00f7(5\u00d75)
=625\u00f75\u00f75
=125\u00f75
=25
\u6269\u5c55\u8d44\u6599
\u7b80\u4fbf\u8ba1\u7b97\u65b9\u6cd5\uff1a
1\u3001\u5728\u540c\u7ea7\u8fd0\u7b97\u4e2d\uff0c\u53ef\u4ee5\u4efb\u610f\u4ea4\u6362\u6570\u5b57\u7684\u4f4d\u7f6e\uff0c\u4f46\u8981\u8fde\u7740\u524d\u9762\u7684\u7b26\u53f7\u4e00\u8d77\u4ea4\u6362\u3002\uff08\u52a0\u6cd5\u6216\u4e58\u6cd5\u4ea4\u6362\u5f8b\uff09
2 \u3001\u5728\u540c\u7ea7\u8fd0\u7b97\u4e2d\uff0c\u52a0\u53f7\u6216\u4e58\u53f7\u540e\u9762\u53ef\u4ee5\u76f4\u63a5\u6dfb\u62ec\u53f7\uff0c\u53bb\u62ec\u53f7\u3002\u51cf\u53f7\u3001\u9664\u53f7\u540e\u9762\u6dfb\u62ec\u53f7\uff0c\u53bb\u62ec\u53f7\uff0c\u62ec\u53f7\u91cc\u9762\u7684\u8981\u53d8\u53f7\u3002\uff08\u52a0\u6cd5\u6216\u4e58\u6cd5\u7ed3\u5408\u5f8b\uff09
3\u3001\u51d1\u4e00\u6cd5\uff0c\u51d1\u5341\u6cd5\uff0c\u51d1\u767e\u6cd5\uff0c\u51d1\u5343\u6cd5\uff1a\u201c\u524d\u9762\u51d1\u4e5d\uff0c\u672b\u5c3e\u51d1\u5341\u201d\u3002
\u5fc5\u8bb0\uff1a25\u627e4\u51d1100\uff0c125\u627e8\u51d11000 \uff08\u51d1\u6574\u601d\u60f3\uff09
分析:
如果被除数与除数同时乘以或除以同一个不为零的数,那么商不变.
a÷b = (a×c)÷(b×c) (b≠0,c≠0)
a÷b = (a÷c)÷(b÷c) (b≠0,c≠0)
625÷25把除数25乘以4就变成100,同时625也要乘以4,计算就简便了.
解: 625÷25
=(625×4)÷(25×4)
= 2500÷100
= 25
绛旓細瑙: 625梅25 =(625脳4)梅(25脳4)= 2500梅100 = 25
绛旓細鐢ㄧ畝渚挎柟娉曡绠:625梅25鍒嗘瀽:濡傛灉琚櫎鏁颁笌闄ゆ暟鍚屾椂涔樹互鎴栭櫎浠ュ悓涓涓笉涓洪浂鐨勬暟,閭ｄ箞鍟嗕笉鍙.a梅b = (a脳c)梅(b脳c) (b鈮0,c鈮0)a梅b = (a梅c)梅(b梅c) (b鈮0,c鈮0)625梅25鎶婇櫎鏁25涔樹互4灏卞彉鎴100,鍚屾椂625涔熻涔樹互4,璁＄畻灏辩畝渚夸簡.瑙: 625梅25 =(625脳4)梅(25脳4)= 2500梅100 = 2...
绛旓細625/25=(600+25)/25=24+1=25
绛旓細625梅25鐨勭畝渚胯绠楀涓嬶細625梅25 =625梅(5脳5)=625梅5梅5 =125梅5 =25 灏忓鏁板绠渚挎柟娉曞綊绾 1銆佹彁鍙栧叕鍥犲紡锛氳繖涓柟娉曞疄闄呬笂鏄繍鐢ㄤ簡涔樻硶鍒嗛厤寰嬶紝灏嗙浉鍚屽洜鏁版彁鍙栧嚭鏉ワ紝鑰冭瘯涓線寰鍓╀笅鐨勯」鐩稿姞鍑忥紝浼氬嚭鐜颁竴涓暣鏁般2銆佸熸潵鍊熷幓娉曪細鐪嬪埌鍚嶅瓧锛屽氨鐭ラ亾杩欎釜鏂规硶鐨勫惈涔夈傜敤姝ゆ柟娉曟椂锛岄渶瑕佹敞鎰忚瀵燂紝鍙...
绛旓細625梅25鐨勭畝渚胯绠楋細625梅25=625梅(5脳5)=625梅5梅5=125梅5=25銆傜畝渚胯绠楁槸涓绉嶇壒娈婄殑璁＄畻锛屽畠杩愮敤浜嗚繍绠楀畾寰嬩笌鏁板瓧鐨勫熀鏈ц川锛屼粠鑰屼娇璁＄畻绠渚匡紝浣夸竴涓緢澶嶆潅鐨勫紡瀛愬彉寰楀緢瀹规槗璁＄畻鍑哄緱鏁般傚湪杩涜绠渚胯繍绠楁椂锛屽簲娉ㄦ剰杩愮畻绗﹀彿鍜屽ぇ銆佷腑銆佸皬鎷彿涔嬮棿鐨勫叧杩炪傜畝渚胯绠楃浉鍏冲畾寰 涔樻硶鍒嗛厤寰 绠渚胯绠...
绛旓細25闄や互澶ф墿鍙125闄や互灏忔墿鍙625闄や互25 鍗25梅銆125梅锛625梅25锛夈=25梅銆125x25梅625銆=25x625梅125梅25 =625梅125 =5
绛旓細625鏄25鐨勫钩鏂癸紝鍗 625 = 25 脳 25銆傚洜姝わ紝鎴戜滑鍙互鍒╃敤杩欎釜鍏崇郴鏉ョ畝鍖栬绠椼傚叿浣撴潵璇达紝鎴戜滑鍙互灏嗗師闂杞寲涓猴細625 梅 25 = (25 脳 25) 梅 25 杩欐牱锛屾垜浠彧闇瑕佽繘琛屼竴娆￠櫎娉曡繍绠楋紝鍗 25 梅 25锛岀劧鍚庡啀涔樹互25銆傝绠楃粨鏋滀负锛25 鎵浠ワ紝625 梅 25 鐨勭畝渚胯繍绠缁撴灉鏄細25銆傞櫎娉曞涔犳妧宸э細1. ...
绛旓細625/25=25銆璁＄畻杩囩▼濡備笅鍥
绛旓細(105x12涓635)梅25 =(105脳2脳6-635)梅25 =锛210脳6-635锛壝25 =锛1260-635锛壝25 =625梅25 =锛625脳4锛壝(25脳4)=2500梅100 =25
绛旓細(625锛625梅25)脳4 =(25脳25锛25脳25梅25)脳4 =25脳25脳4锛25脳4 =2500锛100 =2400 鍥炵瓟瀹屾瘯锛屽笇鏈涜兘甯埌浣狅紝婊℃剰璇风偣璧烇紝璋㈣阿锛
