一辆车的轮子的直径是40厘米,行驶了800米,轮子大约赚了多少圈?结果保留整数 理工学科是什么
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\u603b\u4e4b\uff0c\u5728\u5b66\u4e60\u7684\u8fc7\u7a0b\u4e2d\uff0c\u6211\u4eec\u8981\u8ba4\u8bc6\u5230\u5b66\u4e60\u7684\u91cd\u8981\u6027\uff0c\u5145\u5206\u53d1\u6325\u81ea\u5df1\u7684\u4e3b\u89c2\u80fd\u52a8\u6027\uff0c\u4ece\u5c0f\u7684\u7ec6\u8282\u6ce8\u610f\u8d77\uff0c\u517b\u6210\u826f\u597d\u7684\u5b66\u4e60\u4e60\u60ef\uff0c\u4ee5\u57f9\u517b\u601d\u8003\u95ee\u9898\u3001\u5206\u6790\u95ee\u9898\u548c\u89e3\u51b3\u95ee\u9898\u7684\u80fd\u529b\u3002
\uff01
\u3000\u3000\u7406\u5de5\u5b66\u79d1\u662f\u6307\u7406\u5b66\u548c\u5de5\u5b66\u4e24\u5927\u5b66\u79d1\u3002\u7406\u5de5\uff0c\u662f\u4e00\u4e2a\u5e7f\u5927\u7684\u9886\u57df\u5305\u542b\u7269\u7406\u3001\u5316\u5b66\u3001\u751f\u7269\u3001\u5de5\u7a0b\u3001\u5929\u6587\u3001\u6570\u5b66\u53ca\u524d\u9762\u516d\u5927\u7c7b\u7684\u5404\u79cd\u8fd0\u7528\u4e0e\u7ec4\u5408\u3002
\u3000\u3000\u7406\u5b66
\u3000\u3000\u7406\u5b66\u662f\u4e2d\u56fd\u5927\u5b66\u6559\u80b2\u4e2d\u91cd\u8981\u7684\u4e00\u652f\u5b66\u79d1,\u662f\u6307\u7814\u7a76\u81ea\u7136\u7269\u8d28\u8fd0\u52a8\u57fa\u672c\u89c4\u5f8b\u7684\u79d1\u5b66,\u5927\u5b66\u7406\u79d1\u6bd5\u4e1a\u540e\u901a\u5e38\u5373\u6210\u4e3a\u7406\u5b66\u58eb\u3002\u4e0e\u6587\u5b66\u3001\u5de5\u5b66\u3001\u6559\u80b2\u5b66\u3001\u5386\u53f2\u5b66\u7b49\u5e76\u5217\uff0c\u7ec4\u6210\u4e86\u6211\u56fd\u7684\u9ad8\u7b49\u6559\u80b2\u5b66\u79d1\u4f53\u7cfb\u3002
\u3000\u3000\u7406\u5b66\u7814\u7a76\u7684\u5185\u5bb9\u5e7f\u6cdb\uff0c\u672c\u79d1\u4e13\u4e1a\u901a\u5e38\u6709\uff1a\u6570\u5b66\u4e0e\u5e94\u7528\u6570\u5b66\u3001\u4fe1\u606f\u4e0e\u8ba1\u7b97\u79d1\u5b66\u3001\u7269\u7406\u5b66\u3001\u5e94\u7528\u7269\u7406\u5b66\u3001\u5316\u5b66\u3001\u5e94\u7528\u5316\u5b66\u3001\u751f\u7269\u79d1\u5b66\u3001\u751f\u7269\u6280\u672f\u3001\u5929\u6587\u5b66\u3001\u5730\u8d28\u5b66\u3001\u5730\u7403\u5316\u5b66\u3001\u5730\u7406\u79d1\u5b66\u3001\u8d44\u6e90\u73af\u5883\u4e0e\u57ce\u4e61\u89c4\u5212\u7ba1\u7406\u3001\u5730\u7406\u4fe1\u606f\u7cfb\u7edf\u3001\u5730\u7403\u7269\u7406\u5b66\u3001\u5927\u6c14\u79d1\u5b66\u3001\u5e94\u7528\u6c14\u8c61\u5b66\u3001\u6d77\u6d0b\u79d1\u5b66\u3001\u6d77\u6d0b\u6280\u672f\u3001\u7406\u8bba\u4e0e\u5e94\u7528\u529b\u5b66\u3001\u5149\u5b66\u3001\u6750\u6599\u7269\u7406\u3001\u6750\u6599\u5316\u5b66\u3001\u73af\u5883\u79d1\u5b66\u3001\u751f\u6001\u5b66\u3001\u5fc3\u7406\u5b66\u3001\u5e94\u7528\u5fc3\u7406\u5b66\u3001\u7edf\u8ba1\u5b66\u7b49\u3002
\u3000\u3000\u5de5\u5b66
\u3000\u3000\u5de5\u5b66\u662f\u6307\u5de5\u7a0b\u5b66\u79d1\u7684\u603b\u79f0\u3002\u5305\u542b \u4eea\u5668\u4eea\u8868 \u80fd\u6e90\u52a8\u529b \u7535\u6c14\u4fe1\u606f \u4ea4\u901a\u8fd0\u8f93 \u6d77\u6d0b\u5de5\u7a0b \u8f7b\u5de5\u7eba\u7ec7 \u822a\u7a7a\u822a\u5929 \u529b\u5b66\u751f\u7269\u5de5\u7a0b \u519c\u4e1a\u5de5\u7a0b \u6797\u4e1a\u5de5\u7a0b \u516c\u5b89\u6280\u672f \u690d\u7269\u751f\u4ea7 \u5730\u77ff \u6750\u6599 \u673a\u68b0 \u98df\u54c1 \u6b66\u5668 \u571f\u5efa \u6c34\u5229\u6d4b\u7ed8 \u73af\u5883\u4e0e\u5b89\u5168 \u5316\u5de5\u4e0e\u5236\u836f \u7b49\u4e13\u4e1a\u3002
圈数=800÷12.56=
自己算!
绛旓細鍛ㄩ暱c=蟺d=3.14脳0.4m=12.56m 鍦堟暟=800梅12.56= 鑷繁绠!
绛旓細40鍘樼背=0.4绫 0.4x3.14x1000=1256锛堢背锛
绛旓細鍥犱负杞﹀瓙姣忓垎閽熻浆100鍦堬紝鎵浠ユ瘡鍒嗛挓鍙互璧100脳蟺d=100脳3.14脳40=12560鍘樼背锛屾墍浠ヤ竴鍏遍渶瑕314梅125.6=2.5鍒嗛挓
绛旓細杞﹂=杞瓙鍛ㄩ暱脳姣忓垎閽熻浆鐨勫湀鏁=锛40脳3.14锛壝100=12560锛鍘樼背锛=0.1256锛堝崈绫/鍒嗛挓锛夌敤鏃=6.28梅0.1256=50锛堝垎閽燂級绛旓細鐢ㄦ椂50鍒嗛挓
绛旓細棣栧厛锛屾垜浠鐭ラ亾姣忓垎閽熻澶氬皯鍗冪背锛岃鍏堢畻鍑杞﹁疆鍛ㄩ暱锛屽嵆锛40脳3.14=125.6(鍘樼背);鎴戜滑鍐嶇敤杞﹁疆鍛ㄩ暱鎴愭瘡鍒嗛挓杞燂紝鍗筹細125.6脳100=12560锛堝帢绫筹級锛屽洜涓烘槸6.28鍗冪背锛屾垜浠妸12560鍘樼背鎹㈡垚0.1256鍗冪背锛屼篃灏辨槸璇达紝杩欑鑷杞︽瘡鍒嗛挓琛0.1256鍗冪背锛屾渶鍚庣敤6.28梅0.1256=50锛堝垎閽燂級銆傜瓟锛氶渶50鍒嗛挓銆...
绛旓細40cm=0.4绫炽 杞瓙姣忚浆涓鍦堝氨鏄0.4蟺绫 鎵浠ユ瘡鍒嗛挓璧40 蟺 绫 6280绫抽櫎浠40蟺灏辨槸绛旀 杩欓鐨勬牳蹇冨湪浜庤疆瀛愯浆涓鍦堬紝璧拌繃鐨勮矾绋嬫槸杞瓙鐨鍛ㄩ暱銆 鎵浠ョ瓟妗堟槸6280闄や互40蟺 銆 蟺鍙3.14鐨 璇濈害绛変簬50鍒嗛挓鍚
绛旓細杞瓙涓鍦堣蛋杩囩殑璺濈涓0.04*3.14 绫筹紝涓鍒嗛挓500鍦 璧拌繃 0.04*3.14*500 绫炽傝蛋瀹屾暣搴фˉ闇鏃 1256梅(0.04*3.14*500)=20 鍒嗛挓銆
绛旓細閲嶅簡鍦版柟鐨勯浮鍏溅杞儙閫氬父灏哄鏄洿寰40鍘樼背銆傞浮鍏溅鐨勭粨鏋勭畝鍗曪紝涓昏鐢辫溅韬杞﹁疆缁勬垚銆傝溅韬槸鐢卞潥纭佽川闊х殑鏈ㄦ潗濡傛ご銆佹绛夋爲鏈ㄥ妶鍑垮垱鍒舵垚鐨勩備竴鑸暱4灏猴紝鍓嶅畨鏈ㄨ疆锛岃疆杈圭紭鍖呯‖姗¤兌(姣旇緝楂樻。鐨勯浮鍏溅鐢ㄦ鑳惰疆鑳)锛岄氬父灏哄鏄鐩村緞40鍘樼背锛岃疆瀛楂樺嚭杞﹁韩锛岀敤鏈ㄦ澘鎶や綇锛屾瀯鎴愬嚫褰傝溅韬悗閮ㄦ湁鑴氭敮鏋讹紝渚夸簬...
绛旓細骞宠 杞12瀵杞﹁疆鐩村緞鏈40鍘樼背锛鍥犱负1瀵=3.33鍘樸傞偅涔12瀵=12x3.33鍘樼背=39.93鍘樼背鈮40鍘樼背銆傚钩琛¤溅锛屽張鍙綋鎰熻溅銆佹濈淮杞︺佹憚浣嶈溅绛夈傚競鍦轰笂涓昏鏈夌嫭杞拰鍙岃疆涓ょ被銆傚叾杩愪綔鍘熺悊涓昏鏄缓绔嬪湪涓绉嶈绉颁负鈥滃姩鎬佺ǔ瀹氣濈殑鍩烘湰鍘熺悊涓娿傚钩琛¤溅閲囩敤涓や釜杞瓙鏀拺锛岃搫鐢垫睜渚涚數锛屾棤鍒风數鏈洪┍鍔紝鍔犱笂鍗曠墖鏈烘帶鍒讹紝...
绛旓細浣犲ソ锛12瀵告寚鐨勬槸閽㈠湀鐨勫ぇ灏忥紝閽㈠湀澶氬皯鎸囩殑鏄洿寰勶紒12瀵鐨勮疆瀛愮殑鐩村緞鏄40鍘樼背锛佽繖涓疆瀛愭瘮杈冨皬鍚э紝涓鑸敤鍦ㄧ數鐡朵笁杞溅涓婏紒姹借溅杞瓙鏈灏忛兘鏈14瀵镐簡锛佸笇鏈涙垜鐨勭瓟妗堣兘甯埌浣
