五年级的比字条件应用题
\u5e94\u7528\u9898\u7684\u5b57\u5c11\u800c\u4e14\u7b80\u5355\u8981\u4e94\u5e74\u7ea7\u4e0a\u518c \u6025\u60251\u3001\u7b51\u8def\u961f\u8981\u4fee\u4e00\u6761\u957f180\u5343\u7c73\u7684\u8def\uff0c\u539f\u6765\u6bcf\u5929\u4fee6\u5343\u7c73\uff0c\u4fee\u4e8615\u5929\u4ee5\u540e\u52a0\u5feb\u901f\u5ea6\uff0c\u6bcf\u5929\u4fee7.5\u5343\u7c73\uff0c\u4fee\u5b8c\u8fd9\u6761\u8def\u8fd8\u8981\u591a\u5c11\u5929?
1\u3001\uff08180\uff0d6\u00d715\uff09\u00f77.5\uff1d12\uff08\u5929\uff09
2\u3001\u5efa\u7b51\u5de5\u5730\u9700\u8981\u6c99\u5b50106\u5428\uff0c\u5148\u7528\u5c0f\u6c7d\u8f66\u8fd015\u6b21\uff0c\u6bcf\u6b21\u8fd02.4\u5428\u3002\u5269\u4e0b\u7684\u6539\u7528\u5927\u8f66\u8fd0\uff0c\u6bcf\u6b21\u8fd05\u5428\uff0c\u8fd8\u8981\u51e0\u6b21\u8fd0\u5b8c\uff1f
2\u3001\uff08106\uff0d2.4\u00d715\uff09\u00f75\uff1d14\uff08\u6b21\uff09
3\u3001\u5f20\u7acb\u4e70\u6765\u300a\u5bd3\u8a00\u6545\u4e8b\u300b\u548c\u300a\u82f1\u8bed\u5e7d\u9ed8\u300b\u54044\u672c\uff0c\u5171\u4ed820\u5143\uff0c\u627e\u56de7.6\u5143\uff0c\u6bcf\u672c\u300a\u5bd3\u8a00\u6545\u4e8b\u300b1.6\u5143\uff0c\u6bcf\u672c\u300a\u82f1\u8bed\u5e7d\u9ed8\u300b\u591a\u5c11\u5143\uff1f
3\u3001\uff0820\uff0d7.6\uff09\u00f74\uff0d1.6\uff1d1.5\uff08\u5143\uff09
4\u3001\u4eba\u6c11\u516c\u56ed\u539f\u6765\u670930\u6761\u8239\uff0c\u6bcf\u5929\u6536\u5165540\u5143\u3002\u73b0\u5728\u6bd4\u539f\u6765\u591a15\u6761\u8239\uff0c\u73b0\u5728\u6bcf\u5929\u6536\u5165\u591a\u5c11\u5143\uff1f
4\u3001540\u00f730\u00d7\uff0830\uff0b15\uff09\uff1d810\uff08\u5143\uff09
5\u3001\u7535\u89c6\u673a\u5382\u539f\u8ba1\u521236\u5929\u751f\u4ea7\u5f69\u75351680\u53f0\uff0c\u524d16\u5929\u5b8c\u6210\u4e86\u4e00\u534a\u3002\u5269\u4e0b\u7684\u6253\u7b976\u5929\u5b8c\u6210\uff0c\u5e73\u5747\u6bcf\u5929\u751f\u4ea7\u591a\u5c11\u53f0\uff1f
5\u30011680\u00f72\u00f76\uff1d140\uff08\u53f0\uff09
1\u3001\u67d0\u5382\u6709\u4e00\u6279\u7164\uff0c\u539f\u8ba1\u5212\u6bcf\u5929\u70e75\u5428\uff0c\u53ef\u4ee5\u70e745\u5929\u3002\u5b9e\u9645\u6bcf\u5929\u5c11\u70e70.5\u5428\uff0c\u8fd9\u6279\u7164\u53ef\u4ee5\u70e7\u591a\u5c11\u5929\uff1f
1\u30015\u00d745\u00f7\uff085\uff0d0.5\uff09\uff1d50\uff08\u5929\uff09
2\u3001\u5b66\u6821\u4e70\u6765150\u7c73\u957f\u7684\u5851\u6599\u7ef3\uff0c\u5148\u526a\u4e0b7.5\u7c73\uff0c\u505a3\u6839\u540c\u6837\u957f\u7684\u8df3\u7ef3\u3002\u7167\u8fd9\u6837\u8ba1\u7b97\uff0c\u5269\u4e0b\u7684\u5851\u6599\u7ef3\u8fd8\u53ef\u4ee5\u505a\u591a\u5c11\u6839\uff1f
2\u3001\uff08150\uff0d7.5\uff09\u00f7\uff087.5\u00f73\uff09\uff1d57\uff08\u6839\uff09
3\u3001\u4fee\u4e00\u6761\u6c34\u6e20\uff0c\u539f\u8ba1\u5212\u6bcf\u5929\u4fee0.48\u5343\u7c73\uff0c30\u5929\u4fee\u5b8c\u3002\u5b9e\u9645\u6bcf\u5929\u591a\u4fee0.02\u5343\u7c73\uff0c\u5b9e\u9645\u4fee\u4e86\u591a\u5c11\u5929\uff1f
3\u30010.48\u00d730\u00f7\uff080.48\uff0b0.02\uff09\uff1d28.8\uff08\u5929\uff09
4\u3001\u738b\u8001\u5e08\u770b\u4e00\u672c\u4e66\uff0c\u5982\u679c\u6bcf\u5929\u770b32\u9875\uff0c15\u5929\u770b\u5b8c\u3002\u73b0\u5728\u6bcf\u5929\u770b40\u9875\uff0c\u53ef\u4ee5\u63d0\u524d\u51e0\u5929\u770b\u5b8c\uff1f
4\u300115\uff0d32\u00d715\u00f740\uff1d3\uff08\u5929\uff09
5\u3001\u4e00\u8f86\u6c7d\u8f664\u5c0f\u65f6\u884c\u9a76\u4e86260\u5343\u7c73\uff0c\u7167\u8fd9\u6837\u7684\u901f\u5ea6\uff0c\u53c8\u884c\u4e862.4\u5c0f\u65f6\uff0c\u524d\u540e\u4e00\u5171\u884c\u9a76\u4e86\u591a\u5c11\u5343\u7c73\uff1f\uff08\u7528\u4e24\u79cd\u65b9\u6cd5\u89e3\u7b54\uff09
5\u3001260\u00f74\u00d72.4\uff0b260\uff1d416\uff08\u5343\u7c73\uff09 260\u00f74\u00d7\uff084\uff0b2.4\uff09\uff1d416\uff08\u5343\u7c73\uff09
6\u3001\u77f3\u6cb3\u519c\u573a\u5148\u6d3e8\u53f0\u6536\u5272\u673a\u53c2\u52a0\u6536\u5272\u665a\u7a3b\uff0c\u524d2\u5929\u6536\u527219.2\u516c\u9877\uff0c\u540e\u6765\u589e\u52a0\u523013\u53f0\u6536\u5272\u673a\uff0c\u7528\u540c\u6837\u7684\u901f\u5ea6\u53c8\u52724\u5929\uff0c\u4ed6\u4eec\u4e00\u5171\u5272\u591a\u5c11\u516c\u9877\uff1f
6\u300119.2\u00f72\u00f78\u00d74\u00d713\uff0b19.2\uff1d81.6\uff08\u516c\u9877\uff09
7\u3001\u7532\u4e59\u4e24\u5730\u76f8\u8ddd600\u5343\u7c73\uff0c\u4e00\u5217\u5ba2\u8f66\u548c\u4e00\u5217\u8d27\u8f66\u540c\u65f6\u4ece\u7532\u5f00\u5f80\u4e59\uff0c\u5ba2\u8f66\u6bd4\u8d27\u8f66\u65e9\u52304\u5c0f\u65f6\uff0c\u5ba2\u8f66\u5230\u4e59\u5730\u65f6\uff0c\u8d27\u8f66\u884c\u4e86400\u5343\u7c73\u3002\u5ba2\u8f66\u884c\u5b8c\u5168\u7a0b\u8981\u7528\u591a\u957f\u65f6\u95f4\uff1f
7\u3001 600\u00f7[\uff08600\uff0d400\uff09\u00f74]\uff0d4\uff1d8\uff08\u5c0f\u65f6\uff09 \u6216 4\u00f7\uff08600\u00f7400\uff0d1\uff09\uff1d8\uff08\u5c0f\u65f6\uff09
\u7532\u4e59\u4e24\u5730\uff0c\u76f8\u8ddd500\u5343\u7c73\uff0c\u7532\u6bcf\u5c0f\u65f6\u884c30\u5343\u7c73\uff0c\u4e59\u6bcf\u5c0f\u65f6\u884c20\u5343\u7c73\uff0c\u95ee\u540c\u65f6\u51fa\u53d1\uff0c\u51e0\u5c0f\u65f6\u76f8\u9047\uff1f
500\u00f7\uff0830+20\uff09=10
1\uff0e\u5546\u5e97\u6709\u5f69\u8272\u7535\u89c6\u673a210\u53f0\uff0c\u6bd4\u9ed1\u767d\u7535\u89c6\u673a\u76843\u500d\u8fd8\u591a21\u53f0\uff0e\u5546\u5e97\u6709\u9ed1\u767d\u7535\u89c6\u673a\u591a\u5c11\u53f0\uff1f
1\uff0e63\u53f0
2\uff0e\u7528\u4e00\u6839\u957f12.4\u5206\u7c73\u7684\u94c1\u4e1d\u56f4\u6210\u4e00\u4e2a\u7b49\u8170\u68af\u5f62\uff0c\u5df2\u77e5\u8fd9\u4e2a\u68af\u5f62\u7684\u4e24\u8170\u5171\u957f6.4\u5206\u7c73\uff0c\u9762\u79ef\u662f9\u5e73\u65b9\u5206\u7c73\uff0c\u8fd9\u4e2a\u68af\u5f62\u7684\u9ad8\u662f\u591a\u5c11\u5206\u7c73\uff1f\uff08\u7528\u65b9\u7a0b\u89e3\u7b54\uff09
2\uff0e3\u7c73
3\uff0e\u6cb3\u91cc\u6709\u9e45\u9e2d\u82e5\u5e72\u53ea\uff0c\u5176\u4e2d\u9e2d\u7684\u53ea\u6570\u662f\u9e45\u7684\u53ea\u6570\u76844\u500d\uff0e\u53c8\u77e5\u9e2d\u6bd4\u9e45\u591a27\u53ea\uff0c\u9e45\u548c\u9e2d\u5404\u591a\u5c11\u53ea\uff1f
3\uff0e\u9e459\u53ea\uff0c\u9e2d36\u53ea
4\uff0e\u4e00\u4e2a\u6797\u573a\u8981\u683d\u68112000\u68f5\uff0c\u524d3\u5929\u5e73\u5747\u6bcf\u5929\u683d350\u68f5\uff0e\u5176\u4f59\u7684\u8981\u6c422\u5929\u683d\u5b8c\uff0c\u5e73\u5747\u6bcf\u5929\u8981\u683d\u591a\u5c11\u68f5\uff1f
4\uff0e475\u68f5
\u4e00\u4e2a\u6570\u76842\u500d\u4e0e\u5b83\u76843\u500d\u7684\u548c\u4e3a20\uff0c\u6c42\u8fd9\u4e2a\u6570\u3002
解：男生占3/4=75%，女生占1-75%=25%。男生比女生多：（75%-25%）÷25%*100%=200%
女生比男生少：（75%-25%）÷75%*100%=66.7%
男生占全班人数的四分之三
所以男生和女生的人数比是3:1
男生比女生多(3-1)/1=200%
女生比男生少(3-1)/3=66.7%
女生占全班为：1-3/4＝1/4
问题1：（3/4-1/4）÷1/4＝200％
问题2：（3/4-1/4）÷3/4＝66.67％
都是3/4-1/4=1/2
绛旓細30銆佷簲骞寸骇鍚屽鏀堕泦鏍戠42鍗冨厠,鍥涘勾绾ф敹闆鐨勬瘮浜斿勾绾灏戙傚洓骞寸骇姣斾簲骞寸骇灏戞敹闆嗘爲绉嶅灏戝崈鍏?鍥涘勾绾ф敹闆嗘爲绉嶅灏戝崈鍏? 31銆佹柊鍏夊皬瀛︿簲骞寸骇鏈128浜,宸茬粡杈惧埌浣撹偛閿荤偧鏍囧噯鐨勫崰銆傝屸滆揪鏍団濈殑瀛︾敓鐨勬槸濂崇敓,鈥滆揪鏍団濈殑鐢风敓鍗犱簲骞寸骇鎬讳汉鏁扮殑鍑犲垎涔嬪嚑? 32銆佷簲骞寸骇鍙傚姞鏁板灏忕粍鐨勬湁36浜,璇枃灏忕粍鐨勪汉鏁版槸鏁板灏忕粍鐨,浣撹偛...
绛旓細鐢茶溅姣斾箼杞﹀琛40鍗冪背 閭ｄ箞鐢茶溅鍒拌揪缁堢偣鐢ㄧ殑鏃堕棿=40/锛50-40锛=4灏忔椂 涓ゅ湴璺濈=40脳5=200鍗冪背 16銆佷袱杈嗚溅浠庣敳涔欎袱鍦板悓鏃剁浉瀵瑰紑鍑,4鏃剁浉閬囥傛參杞︽槸蹇溅閫熷害鐨勪簲鍒嗕箣涓,鐩搁亣鏃跺揩杞︽瘮鎱㈣溅澶氳80鍗冪背锛屼袱鍦扮浉璺濆灏?瑙ｏ細蹇溅鍜屾參杞︾殑閫熷害姣=1锛3/5=5锛3 鐩搁亣鏃跺揩杞﹁浜嗗叏绋嬬殑5/8 鎱㈣溅琛屼簡鍏...
绛旓細鐢风敓姣斿コ鐢熷锛氾紙75%-25%锛壝25%*100%=200 濂崇敓姣旂敺鐢熷皯锛氾紙75%-25%锛壝75%*100%=66.7
绛旓細鐢风敓鍗3/4=75%,濂崇敓鍗1-75%=25%.鐢风敓姣斿コ鐢熷锛氾紙75%-25%锛壝25%*100%=200 濂崇敓姣旂敺鐢熷皯锛氾紙75%-25%锛壝75%*100%=66.7
绛旓細鏈10棰楃豢璞嗭紝绾㈣眴姣旂豢璞2鍊嶅2棰楋紝绾㈣眴鏄豢璞嗙殑鍑犲嶏紵绾㈣眴鏁=10脳2+2=22 绾㈣眴/缁胯眴=22/10=2.2 绾㈣眴鏄豢璞嗙殑2.2鍊
绛旓細锛3锛夐浮鐨勫彧鏁版瘮楦皯1200鍙 楦′笌楦彧鏁版瘮鏄3锛5 灏戯紙5-3锛 = 2浠 閭ｄ箞 1200/2 = 600 楦湁600*5 = 3000鍙 3.鐢层佸凡涓ゆ暟鐨勫钩鍧囨暟鏄42锛屽畠浠鐨勬瘮鏄4锛3 瀹冧滑涓鍏变负42 * 2 = 84 閭ｄ箞鐢蹭负84 * [4/(4+3)] = 48 4.宸茬湅浜60椤碉紝宸茬湅涓庢湭鐪嬮〉鏁扮殑姣斾负3锛4 閭ｄ箞鎬婚〉鏁...
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绛旓細瑙ｏ細璁続B璺濈涓篠锛岀涓娆＄浉閬囨椂鐨勯熷害姣=璺▼姣=5锛3 閭ｄ箞鐩搁亣鍚庣殑閫熷害姣=璺▼姣=5锛1-20%锛夛細3锛1+20%锛=4锛3.6=10锛9 閭ｄ箞鐢插埌杈綛琛屼簡3/8S锛屾牴鎹鎰 3/8S锛氾紙5/8S-24锛=10锛9 27/8S=50/8S-240 23/8S=240 S=1920/23鍗冪背 58銆佺敳涔欎袱浜哄垎鍒粠A銆丅涓ゅ湴鍚屾椂鐩稿悜鑰岃锛岀敳鐨...
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