4.2.3四个数字之间不能使用括号怎么算成24 请用4579这四个数字和一些运算符号组成的算式可以使用括号使...
5669\u56db\u4e2a\u6570\u5b57\u600e\u4e48\u51d1\u621024\uff086+6\uff09\u00d7\u221a\uff089-5\uff09=24\u3002
\u5148\u8ba1\u7b97\u62ec\u53f7\u5185\u7684\u7b97\u5f0f\uff0c\uff086+6\uff09=12\uff1b\uff089-5\uff09=4\uff0c\u8fd9\u6837\u8ba1\u7b97\u5f0f\u53ef\u5316\u7b80\u4e3a12\u00d7\u221a4\uff0c\u221a4=2\uff1b\u6240\u4ee5\u7b49\u5f0f\u53ef\u4ee5\u5316\u7b80\u4e3a12\u00d72=24\u3002
\u6269\u5c55\u8d44\u6599\uff1a
\u7efc\u5408\u7b97\u5f0f\uff08\u56db\u5219\u8fd0\u7b97\uff09\u5e94\u5f53\u6ce8\u610f\u7684\u5730\u65b9\uff1a
1\u3001\u5982\u679c\u53ea\u6709\u52a0\u548c\u51cf\u6216\u8005\u53ea\u6709\u4e58\u548c\u9664\uff0c\u4ece\u5de6\u5f80\u53f3\u8ba1\u7b97\uff0c\u4f8b\u5982\uff1a2+1-1=2\uff0c\u5148\u7b972+1\u7684\u5f97\u6570\uff0c2+1\u7684\u5f97\u6570\u518d\u51cf1\u3002
2\u3001\u5982\u679c\u4e00\u7ea7\u8fd0\u7b97\u548c\u4e8c\u7ea7\u8fd0\u7b97\uff0c\u540c\u65f6\u6709\uff0c\u5148\u7b97\u4e8c\u7ea7\u8fd0\u7b97
3\u3001\u5982\u679c\u4e00\u7ea7\uff0c\u4e8c\u7ea7\uff0c\u4e09\u7ea7\u8fd0\u7b97\uff08\u5373\u4e58\u65b9\u3001\u5f00\u65b9\u548c\u5bf9\u6570\u8fd0\u7b97\uff09\u540c\u65f6\u6709\uff0c\u5148\u7b97\u4e09\u7ea7\u8fd0\u7b97\u518d\u7b97\u5176\u4ed6\u4e24\u7ea7\u3002
4\u3001\u5982\u679c\u6709\u62ec\u53f7\uff0c\u8981\u5148\u7b97\u62ec\u53f7\u91cc\u7684\u6570\uff08\u4e0d\u7ba1\u5b83\u662f\u4ec0\u4e48\u7ea7\u7684\uff0c\u90fd\u8981\u5148\u7b97\uff09\u3002
5\u3001\u5728\u62ec\u53f7\u91cc\u9762\uff0c\u4e5f\u8981\u5148\u7b97\u4e09\u7ea7\uff0c\u7136\u540e\u5230\u4e8c\u7ea7\u3001\u4e00\u7ea7\u3002
\u53c2\u8003\u8d44\u6599\u6765\u6e90\uff1a\u767e\u5ea6\u767e\u79d1-\u56db\u5219\u8fd0\u7b97
\u4f60\u597d\uff01
\u75284,5,7,9\u7b9724\u70b9\uff0c\u5171\u670932\u79cd\u7b97\u6cd5\u3002
[\ufe594\u00d77\ufe5a\uff0b5]\uff0d9
5\uff0d[9\uff0d\ufe597\u00d74\ufe5a]
[\ufe597\u00d74\ufe5a\uff0d9]\uff0b5
9\uff0b[\ufe597\uff0d4\ufe5a\u00d75]
[7\u00d7\ufe599\uff0d5\ufe5a]\uff0d4
\ufe594\u00d77\ufe5a\uff0b\ufe595\uff0d9\ufe5a
\ufe595\uff0d9\ufe5a\uff0b\ufe594\u00d77\ufe5a
[\ufe597\uff0d4\ufe5a\u00d75]\uff0b9
\ufe599\u00d74\ufe5a\uff0d\ufe595\uff0b7\ufe5a
[\ufe599\uff0d5\ufe5a\u00d77]\uff0d4
[\ufe597\u00d74\ufe5a\uff0b5]\uff0d9
\ufe594\u00d77\ufe5a\uff0d\ufe599\uff0d5\ufe5a
9\uff0d[5\u00d7\ufe594\uff0d7\ufe5a]
\ufe599\u00d74\ufe5a\uff0d\ufe597\uff0b5\ufe5a
[\ufe594\u00d79\ufe5a\uff0d5]\uff0d7
[\ufe599\u00d74\ufe5a\uff0d7]\uff0d5
5\uff0b[\ufe594\u00d77\ufe5a\uff0d9]
9\uff0b[5\u00d7\ufe597\uff0d4\ufe5a]
\ufe597\u00d74\ufe5a\uff0d\ufe599\uff0d5\ufe5a
\ufe594\u00d79\ufe5a\uff0d\ufe595\uff0b7\ufe5a
9\uff0d[\ufe594\uff0d7\ufe5a\u00d75]
\ufe594\u00d79\ufe5a\uff0d\ufe597\uff0b5\ufe5a
[5\uff0b\ufe594\u00d77\ufe5a]\uff0d9
5\uff0b[\ufe597\u00d74\ufe5a\uff0d9]
[\ufe594\u00d79\ufe5a\uff0d7]\uff0d5
[5\uff0b\ufe597\u00d74\ufe5a]\uff0d9
\ufe595\uff0d9\ufe5a\uff0b\ufe597\u00d74\ufe5a
[\ufe599\u00d74\ufe5a\uff0d5]\uff0d7
5\uff0d[9\uff0d\ufe594\u00d77\ufe5a]
\ufe597\u00d74\ufe5a\uff0b\ufe595\uff0d9\ufe5a
[5\u00d7\ufe597\uff0d4\ufe5a]\uff0b9
[\ufe594\u00d77\ufe5a\uff0d9]\uff0b5
﹙3×4﹚÷﹙1÷2﹚
4×[3×﹙2÷1﹚]
[﹙2×3﹚÷1]×4
[2＋﹙3＋1﹚]×4
[1＋﹙3＋2﹚]×4
1×[﹙4×3﹚×2]
﹙2×3﹚×﹙4×1﹚
1×[4×﹙3×2﹚]
4×[﹙2＋1﹚＋3]
1×[﹙2×3﹚×4]
2×[﹙4×3﹚÷1]
﹙4×3﹚÷﹙1÷2﹚
2×[﹙3×4﹚×1]
4×[2×﹙3×1﹚]
3×[﹙4×1﹚×2]
3×[1×﹙4×2﹚]
4×[﹙3÷1﹚×2]
1×[3×﹙2×4﹚]
3×[﹙2×4﹚÷1]
﹙2×4﹚÷﹙1÷3﹚
4×[1×﹙2×3﹚]
﹙4÷1﹚×﹙2×3﹚
﹙4×3﹚×﹙1×2﹚
[1×﹙2×3﹚]×4
﹙4＋2﹚×﹙1＋3﹚
[﹙1×3﹚×2]×4
2×[﹙1×4﹚×3]
1×[2×﹙4×3﹚]
[3×﹙2÷1﹚]×4
﹙2×4﹚×﹙3×1﹚
[﹙3×1﹚×4]×2
3÷[﹙1÷4﹚÷2]
[﹙4×2﹚×1]×3
[﹙2×3﹚×4]×1
[1×﹙4×2﹚]×3
[4÷﹙1÷3﹚]×2
﹙4×2﹚×﹙1×3﹚
[3×﹙1×4﹚]×2
[1＋﹙2＋3﹚]×4
[﹙2×1﹚×3]×4
3×[﹙2÷1﹚×4]
﹙4×3﹚×﹙2×1﹚
[3＋﹙1＋2﹚]×4
[2×﹙3×4﹚]×1
[4×﹙3÷1﹚]×2
2×[4×﹙3×1﹚]
4×[﹙1×3﹚×2]
[﹙1×2﹚×3]×4
[3×﹙1×2﹚]×4
4×[2＋﹙1＋3﹚]
4*2*3 = 24
明明是三个数啊 4X2X3么？
连乘不行吗？4*2*3=24
绛旓細[2锛嬶箼3锛1锕歖脳4 [1锛嬶箼3锛2锕歖脳4 1脳[锕4脳3锕毭2]锕2脳3锕毭楋箼4脳1锕1脳[4脳锕3脳2锕歖4脳[锕2锛1锕氾紜3]1脳[锕2脳3锕毭4]2脳[锕4脳3锕毭1]锕4脳3锕毭凤箼1梅2锕2脳[锕3脳4锕毭1]4脳[2脳锕3脳1锕歖3脳[锕4脳1锕毭2]3脳[1脳锕4脳2锕歖4脳[锕3梅1锕...
绛旓細3*2*1=6
绛旓細4.4.2 鍙ュ瓙鍐呴儴涓昏涓庤皳璇箣闂村闇鍋滈】,鐢ㄩ楀彿銆備緥濡: 鎴戜滑鐪嬪緱瑙佺殑鏄熸槦,缁濆ぇ澶氭暟鏄亽鏄熴 4.4.3 鍙ュ瓙鍐呴儴鍔ㄨ瘝涓庡璇箣闂村闇鍋滈】,鐢ㄩ楀彿銆備緥濡: 搴旇鐪嬪埌,绉戝闇瑕佷竴涓汉璐＄尞姣曠敓鐨勭簿鍔涖 4.4.4 鍙ュ瓙鍐呴儴鐘惰鍚庤竟濡傞渶鍋滈】,鐢ㄩ楀彿銆備緥濡: 瀵逛簬杩欎釜鍩庡競,浠栧苟涓嶉檶鐢熴 4.4.5 澶嶅彞鍐呭悇鍒嗗彞涔嬮棿鐨勫仠椤,闄や簡鏈夋椂瑕...
绛旓細6.5 姣忔柟鏃堕棿鍖呭共浣跨敤,涓嶈鐫鏁,鍏堣秴鏃惰呭垽璐熴傜7鏉¤褰7.1 鍦ㄥ灞杩囩▼涓,鍙屾柟瀵规瘡涓鍥炲悎閮借閫愮潃璁板綍,鍔涙眰娓呮櫚鍑嗙‘銆傛瘡杩炵画婕忚4鐫,鍒ょ姱瑙勪竴娆°7.2 濡傛灉涓鏂规墍鍓╂椂闄愬凡涓嶈冻3鍒嗛挓,璇ユ柟鍙殏缂撳饱琛7 .1娆捐瀹,浣嗕竴淇熻浆鍏ヤ笅涓鏃堕檺,蹇呴』棣栧厛琛ュ叏婕忚鐫娉曞悗,鏂瑰彲琛屾. 7.3 瀵瑰眬缁堜簡,瑁佸垽濡傝涓烘煇浠借褰曚笉澶...
绛旓細鎴戞兂搴旇杩欐牱鑰冭檻锛庝粠绗簩椤瑰紑濮嬬殑閫氶」鍏紡搴旇鏄細Ai=A(i-1)x(i-1)/2 鍗崇浜岄」=4x(2-1)/2=2 绗笁椤=2x(3-1)/2=2 绗洓椤=2x(4-1)/2=3 绗簲椤=3x(5-1)/2=6 閭ｄ箞绗叚椤癸紙鍗虫嫭鍙烽」锛=6x(6-1)/2=15
绛旓細涓嶈兘涓姒傝岃銆 鍏蜂綋鐢ㄦ硶鐪嬨婁腑鍗庝汉姘戝叡鍜屽浗鍥藉鏍囧噯:鍑虹増鐗╀笂鏁板瓧鐢ㄦ硶鐨勮瀹氥嬩腑鐨勬湁鍏宠瀹: 4 涓鑸師鍒 4.1 浣跨敤闃挎媺浼暟瀛楁垨鏄眽瀛楁暟瀛,鏈夌殑鎯呭舰閫夋嫨鏄敮涓鑰岀‘瀹氱殑銆 4.1.1 缁熻琛ㄤ腑鐨鏁板,濡傛璐熸暣鏁般佸皬鏁般佺櫨鍒嗘瘮銆佸垎鏁般佹瘮渚嬬瓑,蹇呴』浣跨敤闃挎媺浼暟瀛椼 绀轰緥:48 302 -125.03 34.05% 63%~68% 1/4 2/...
绛旓細锛5-2+3锛墄4=6x4=24 鏈嬪弸锛岃閲囩撼姝ｇ‘绛旀锛屼綘浠彧鎻愰棶锛屼笉閲囩撼姝ｇ‘绛旀锛屽洖绛旈兘娌℃湁鍔诧紒锛侊紒鏈嬪弸锛岃銆愰噰绾崇瓟妗堛戯紝鎮ㄧ殑閲囩撼鏄垜绛旈鐨勫姩鍔涳紝濡傛灉娌℃湁鏄庣櫧锛岃杩介棶銆傝阿璋
绛旓細涓嶅锛屽伓鏁板嶆槸鍋舵暟 鍒ゆ柇涓涓潪闆惰嚜鐒舵暟鏄惁鏄2鐨勫嶆暟鐨勬柟娉:杩欎釜鏁版湯浣嶄笂鐨鏁板瓧鏄惁鏄伓鏁板嵆涓綅涓婃槸0銆2銆4銆6銆8鐨勬暟鏄2鐨勫嶆暟銆傚垽鏂竴涓潪闆惰嚜鐒舵暟鏄惁鏄3鐨勫嶆暟鐨勬柟娉:鍚勪釜鏁颁綅涓婄殑鏁板瓧鍜屾槸鍚︽槸3鐨勫嶆暟;鍚勪釜鏁颁綅涓婃暟瀛楅亣3灏卞垝鎺夛紝鏈鍚庡墿浣欑殑鏁板氨鏄櫎浠3鐨勪綑鏁帮紒鍒ゆ柇涓涓潪闆惰嚜鐒舵暟鏄惁...
绛旓細骞翠唤銆佸彂鏂囬『搴忓彿鐢闃挎媺浼鏁板瓧鏍囨敞;骞翠唤搴旀爣鍏ㄧО,鐢ㄥ叚瑙掓嫭鍙封溿斻曗濇嫭鍏;鍙戞枃椤哄簭鍙蜂笉鍔犫滅鈥濆瓧,涓嶇紪铏氫綅(鍗1涓嶇紪涓01),鍦ㄩ樋鎷変集鏁板瓧鍚庡姞鈥滃彿鈥濆瓧銆 涓婅鏂囩殑鍙戞枃瀛楀彿灞呭乏绌轰竴瀛楃紪鎺,涓庢渶鍚庝竴涓鍙戜汉濮撳悕澶勫湪鍚屼竴琛屻 4.2.6 绛惧彂浜 鐢扁滅鍙戜汉鈥濅笁瀛楀姞鍏ㄨ鍐掑彿鍜岀鍙戜汉濮撳悕缁勬垚,灞呭彸绌轰竴瀛,缂栨帓鍦...
