一道数学题：小明12岁时，只过了3个生日，他的生日是哪天？为什么呢？ 小学数学题解答：小强满12岁时，只过了3个生日。那么他是哪天...
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绛旓細濡傚叕鍏2000骞存槸闂板勾,鑰屽叕鍏1000骞淬3000骞翠笉鏄傝繖閲屾湁涓涓闂板勾璁＄畻鍏紡,鏈夊叴瓒ｇ殑鍙互鐪嬬湅銆 鏈洖绛旇鎻愰棶鑰呴噰绾 鍛ㄨ铔嬫捇 | 鎺ㄨ崘浜2017-12-16 13:29:22 涓炬姤| 璇勮 38 11 2鏈29鍙风敓鏃,姣忓洓骞存墠鏈変竴娆2鏈29鍙,鎵浠12宀佸彧杩浜嗕笁涓敓鏃 liu181748034 | 鍙戝竷浜2015-09-16 涓炬姤| 璇勮 0 0 浣...
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绛旓細杩欏氨鏄涓閬寰堢畝鍗曠殑灏忓鏁板棰橈紝灏忔槑浠婂勾12宀侊紝濂规槸濡堝骞撮緞鐨1/3锛屼篃灏辨槸璇达紝濡傛灉鎶婂濡堢殑骞撮緞鍒嗘垚涓変唤鐨勮瘽锛岄偅涔堝皬鏄庢濂藉崰浜嗗叾涓殑涓浠斤紝鐢12脳3=36锛屽緱鍒板濡堢殑骞撮緞灏辨槸36宀併傚綋鐒讹紝濡傛灉鍋氳繖閬撻鐨勫瀛愬凡缁忔帴鍙楄繃鍒嗘暟鍜屽嶆暟涔嬮棿鐨勫叧绯诲涔狅紝浣犲彲浠ョ粰瀛╁瓙璁诧紝灏忔槑鐨勫勾榫勬槸濡堝骞撮緞鐨1/3锛屾崲涓鍙...
绛旓細鏈堛佹棩鈥濇椂,鏁欏笀鍙厛鍑虹ず棰:灏忔槑浠婂勾12宀,杩囦簡12涓敓鏃,鍙皬鍗庝篃 鏄12宀,浠鍙繃浜3涓敓鏃,浣犵煡閬撹繖鏄庝箞鍥炰簨鍚?杩欐椂瀛︾敓鎯呯华楂樻定, 鐤戦棶浜х敓浜嗗ソ濂,濂藉鍙堣浆鍖栧己鐑堢殑姹傜煡娆叉湜鍜屽涔犲叴瓒ｃ傞殢鍗虫暀甯堟寚鍑:绛 浣犱滑瀛︿簡浠婂ぉ鐨勮鍚庡氨鐭ラ亾浜,杩欐牱浠庡涔犱竴寮濮,灏辨妸瀛︾敓鎺ㄥ埌浜嗕富鍔ㄦ帰绱 鐨勪富浣撳湴浣嶄笂銆 浜屻...
绛旓細鍥犱负骞撮緞鏄5,6,7鍊嶏紝閭ｄ箞骞撮緞宸槸涓瀹氱殑锛屾墍浠ヨ繖涓樊涓瀹氭槸4,5,6鐨勫叕鍊嶆暟銆4,5,6銆=60銆傦紙濡傛灉涓嶆噦浣犵敾涓嚎娈靛浘灏辩湅鏄庣櫧浜嗭級鐭ラ亾骞撮緞宸槸60灏卞鏄撲簡锛岀埛鐖蜂粖骞达細60+60/锛6-1锛=72宀 宸5鍊嶏細60+60/(5-1)=75宀 灏辨槸涓夊勾 瑕佸樊4鍊嶏細60+60/(4-1)=80宀 濡傛灉涓嶆噦鍙互缁х画闂
绛旓細骞撮緞宸笉鍙 鍒欙細40-12=28宀 28梅锛1-5/12锛=48宀 48-40+12=20宀 绛旈偅鏃跺欏皬鏄20宀
绛旓細灏忔槑+灏忕孩=12(1)灏忕孩+灏忓紶=17(2)灏忓紶+灏忔槑=13(3)灏忕孩+灏忓紶+灏忔槑=(12+17+13)梅2=21(4)鍒嗗埆瀵规瘮(4)寮忎笌(1)(2)(3)寮忓緱 灏忕孩:21-12=9 灏忔槑:21-17=4 灏忓紶:21-13=8
绛旓細鏄涓涓鑷劧鏁扮殑闂鍟︼紝鐖风埛鍜屽皬鏄庣殑骞撮緞涔嬪樊闇瑕佸垎鍒槸6锛5锛4锛3锛2鐨勫嶆暟杩欎釜鏁板瓧鏈灏忎负60銆傚洜姝わ紝鏁板瓧涔嬪樊涓60锛岃屼粖骞寸埛鐖锋槸灏忔槑鐨7鍊嶏紝鍥犳鐖风埛70锛屽皬鏄10銆備袱骞村悗锛岀埛鐖72锛屽皬鏄12锛浜斿勾鍚庯紝鐖风埛75锛屽皬鏄15锛屽崄骞村悗锛岀埛鐖80锛屽皬鏄20锛屼簩鍗佸勾鍚庯紝鐖风埛90锛屽皬鏄30锛屼簲鍗佸勾鍚庯紝鐖风埛120锛屽皬鏄...
绛旓細绛锛氬皬鏄浠婂勾12宀侊紝鐖风埛72宀 瑙ｏ細璁剧埛鐖峰勾榫-灏忔槑骞撮緞=a 鍥犱负鐖风埛鐨勫勾榫勪粖骞存槸灏忔槑鐨6鍊 鎵浠鏄5鐨勫嶆暟 杩囧嚑骞寸埛鐖风殑骞撮緞鏄皬鏄5鍊 鎵浠鏄4鐨勫嶆暟 鍐嶈繃鍑犲勾鐖风埛鐨勫勾榫勬槸灏忔槑鐨4鍊 鎵浠鏄3鐨勫嶆暟 a鏈灏忓间负60/120/...鑻ョ埛鐖蜂笌灏忔槑骞撮緞宸间负60 璁剧埛鐖蜂粖骞6b宀侊紝灏忔槑浠婂勾b宀 鎵浠6b-b=...
绛旓細瑙ｏ細8骞村悗灏忔槑鐨勫濮愭瘮灏忔槑澶3宀侊紝閭ｇ幇鍦ㄥ濮愪篃姣斾粬澶3宀 锛27-3锛/2=12宀 濮愬鐨勫勾绾 12+3=15宀
