一道小学比例尺数学题
\u4e00\u9053\u5c0f\u5b66\u516d\u5e74\u7ea7\u5173\u4e8e\u6bd4\u4f8b\u5c3a\u7684\u6570\u5b66\u98983\uff1a15000000=1\uff1a5000000
17\u00f7\uff081/5000000\uff09=850\u5343\u7c73
1\u3001\u56fe\u4e0a\u8ddd\u79bb\u3001\u5b9e\u9645\u8ddd\u79bb
2\u30011\uff1a1000
3\u30011\uff1a5000
4\u300120\u3001200000\u3001400000\u300160000\u300180000
5\u300110\u30011
6\u3001500\u30013000000\u30013500\u300149.5
1)、2.5÷1/100=250(cm) 2÷1/100=200(cm) 2）、250×200=500（cm^2）3)、①、250÷8=31.25(cm) ②比例尺1：31.25
绛旓細1.灏忎竵浠庡鍒板鏍＄殑瀹為檯璺濈鏄100m,鐢诲湪鍥句笂鏄2cm銆傝繖骞呭浘鐨姣斾緥灏鏄灏戯紵姣斾緥灏猴紳鍥句笂璺濈锛氬疄闄呰窛绂 锛2鍘樼背锛100绫 锛2鍘樼背锛10000鍘樼背 锛1锛5000 2.涓ゆ潙瀹為檯璺濈鏄1500m锛岀敾鍦ㄥ浘涓婄殑璺濈鏄7.5cm锛屼綘鐭ラ亾杩欏紶鍥剧殑姣斾緥灏哄悧锛熸瘮渚嬪昂锛濆浘涓婅窛绂伙細瀹為檯璺濈 锛7.5鍘樼背锛1500绫 锛7.5鍘樼背...
绛旓細绛旓細閫夋嫨1锛100鐨姣斾緥灏鍚堥 渚濇嵁鏄笅闈㈢殑绠楀紡 28绫=2800cm 30m=3000cm 2800脳1/100=28锛坈m锛3000脳1/100=30锛坈m锛夌瓟锛氱敾濂藉悗闀挎槸30cm 瀹芥槸28cm
绛旓細1銆佸浘涓婅窛绂汇佸疄闄呰窛绂 2銆1锛1000 3銆1锛5000 4銆20銆200000銆400000銆60000銆80000 5銆10銆1 6銆500銆3000000銆3500銆49.5 鍙傝冭祫鏂欙細鑷繁鍐欑殑锛岄夋垜鍋氭渶浣崇瓟妗堝晩锛
绛旓細鍥句笂璺濈闄や互瀹為檯璺濈=姣斾緥灏 鍥句笂璺濈闄や互姣斾緥灏=瀹為檯璺濈 闀匡細3闄や互4000鍒嗕箣1=12000cm=120m 瀹斤細2闄や互4000鍒嗕箣1=8000cm=80m 闈㈢Н锛120脳80=9600骞虫柟绫
绛旓細杩欐槸绗戠瑧鐨勫崸瀹わ紝鍥句笂璺濈闀2.5鍘樼背锛屽2鍘樼背銆姣斾緥灏1锛100锛1锛夌瑧绗戝崸瀹ょ殑瀹為檯闀垮拰瀹芥槸澶氬皯绫?2.5涔100=250鍘樼背=2.5绫2涔100=2绫(2锛夌瑧绗戝崸瀹ょ殑闈㈢Н鏄灏戝钩鏂圭背锛2涔2.5=5骞虫柟绫筹紙3)绗戠瑧鍦ㄦ湰瀛愪笂鐢昏嚜宸辩殑鍗у鐨勫钩闈㈠浘锛屼粬鐢8鍘樼背琛ㄧず鍗у鐨勯暱.鈶犲浘涓婁竴鍘樼背琛ㄧず瀹為檯澶氬皯鍘樼背锛250闄や互8...
绛旓細150绫=15000鍘樼背 姣斾緥灏=25锛15000=1锛600
绛旓細瑙ｏ細鏁板鏂规硶锛5.4梅锛5+4锛=0.6锛堝帢绫筹級闀=0.6脳5=3鍘樼背 瀹=0.6脳4=2.4鍘樼背 闈㈢Н=3脳2.4梅2脳200=720骞虫柟鍘樼背 鏂圭▼鏂规硶锛氳闀夸负X锛屽垯瀹戒负5.4-X X:(5.4-X)=5:4 5(5.4-X)=4X 27-5X=4X 9X=27 X=3 瀹=5.4-3=2.4鍘樼背 闈㈢Н=3脳2.4梅2脳200=720骞虫柟鍘樼背 ...
绛旓細姣斾緥灏涓1锛500锛屾槸璇存槑鍥句笂灏哄鍜屽疄闄呭昂瀵哥殑姣斾緥 鍥犳鏁欏鐨勫疄闄呴暱涓 3脳500=1500cm锛涘疄闄呭涓 2脳500=1000cm 锛1锛夋暀瀹ょ殑鍥句笂闈㈢Н3脳2=6骞虫柟鍘樼背 瀹為檯闈㈢Н1500脳1000=1500000骞虫柟鍘樼背 锛2锛夊浘涓婇潰绉拰瀹為檯闈㈢Н鐨勬瘮6锛1500000=1锛250000 ...
绛旓細鈥滀付娣℃贰鐨勮姳棣欌濇偍濂斤紝寰堥珮鍏翠负鎮ㄨВ绛旓紒姣斾緥灏 鍥句笂璺濈 瀹為檯璺濈 1锛200000 锛1.25cm锛 2.5km 1锛60000000 3cm 锛1800km锛夛紙1锛1锛 18cm 1.8dm 甯屾湜鎴戠殑鍥炵瓟瀵规偍鏈夊府鍔﹡璇烽噰绾冲摝
绛旓細鍦ㄤ竴骞呭湴鍥句笂锛岄噺鐨勫寳浜埌涓婃捣鐨勮窛绂绘槸4.2鍘樼背锛岃屽寳浜埌涓婃捣鐨勫疄闄呰窛绂绘槸1050鍗冪背锛屾眰鐫骞呭浘鐨姣斾緥灏銆傝В锛1050鍗冪背=1050000锛4.2=250000锛1 鍦ㄦ瘮渚嬪昂1锛2000鐨勫浘绾镐笂閲忕殑涓鍧椾笁瑙掑舰鐨勫疄楠岀敯鐨勯暱鏄4鍘樼背锛岄珮鏃3鍘樼背锛岃繖鍧楄瘯楠岀敯鐨勫疄闄呴潰绉槸澶氬皯骞虫柟绫筹紵瑙ｏ細4脳3脳2000=24000锛堝钩鏂圭背锛...
