8乘25十7乘8简便方法四年级下册？ 25×7乘8×4简便计算四年级的
8/7\u00d725\u00d77/8\u7b80\u4fbf\u8ba1\u7b978/7\u00d725\u00d77/8\u7b80\u4fbf\u8ba1\u7b97\uff1a
8/7x25x7/8
=8/7x7/8x25
=1x25
=25
\u6269\u5c55\u8d44\u6599
\u7b80\u4fbf\u8ba1\u7b97\u65b9\u6cd5\uff1a
\u51d1\u6574\u6cd5
\u5c31\u662f\u8fd0\u7528\u52a0\u6cd5\u548c\u4e58\u6cd5\u7684\u5b9a\u5f8b\u4ee5\u53ca\u51cf\u6cd5\u548c\u9664\u6cd5\u7684\u6027\u8d28\u51d1\u6574\u8ba1\u7b97\uff0c\u4e5f\u5c31\u662f\u51d1\u6210\u4e00\u4e2a\u6574\u5343\u6216\u6574\u767e\u3001\u6574\u5341\u7684\u6570\uff0c\u76f4\u63a5\u8fdb\u884c\u7b80\u4fbf\u8fd0\u7b97\u3002
\u4f8b\u9898
3643-74+6357-126
=\uff083643+6357\uff09-\uff0874+126\uff09
=1000-200
=800
\u901a\u8fc7\u89c2\u5bdf\u9898\u4e2d\u6570\u5b57\u7684\u7279\u70b9\uff0c\u5c063643\u548c6357\u76f8\u52a0\u51d1\u6210\u6574\u5343\uff0c\u5229\u7528\u51cf\u6cd5\u7684\u6027\u8d28\u5c0674\u4e0e126\u53ef\u51d1\u6210\u4e00\u4e2a\u6574\u767e\u6570\uff0c\u4f7f\u8ba1\u7b97\u7b80\u4fbf\u3002
\u300025\u00d77\u00d78\u00d74
=25\u00d74\u00d7\uff087\u00d78\uff09
=100\u00d756
=5600
绛旓細125脳6脳8 25脳24 32脳305 103脳15 78脳24锛24脳68 49脳49+49脳(40+6)脳25 (68+32)脳5 68+32脳5 49脳99+49 36脳97锛58脳36+61脳36 3000梅25梅47 20梅15梅61 50梅25梅2 5000梅8梅125 99脳23锛23 56脳7锛45脳7锛71 25脳13脳8 72梅6脳(51锛19)3.4锛4.6锛2.9 900...
绛旓細11) (404+195+96)+305= 锕404+96锕氾耿锕195+305锕 =900 12) 793+393= 锕800-7锕氾耿锕400-7锕=1200-14=1186 13) (106+45+94)+155= 锕106+94锕氾耿锕45+155锛=400 14) 433+(477+67)+23= (433+67锕氾耿锕477+23锕=1000 15) 25+(251+275+49)= 锕25+175锕氾耿锕251锕...
绛旓細鍥涘勾绾杩愮畻寰嬫湁鍝簺 鍔狅紙鍑忥紝涔锛岄櫎锛夋硶缁撳悎寰嬶紝鍒嗛厤寰嬶紝浜ゆ崲寰嬨傚皬瀛﹀洓骞寸骇杩愮畻寰嬬殑璁＄畻棰樻湁鍝簺 绫诲瀷涓锛氾紙娉ㄦ剰锛氫竴瀹氳鎷彿澶栫殑鏁板垎鍒箻鎷彿閲岀殑涓や釜鏁帮紝鍐嶆妸绉浉鍔狅級锛40锛8锛壝25 125脳锛8+80锛 36脳锛100+50锛24脳锛2锛10锛 86脳锛1000锛2锛 15脳锛40锛8锛夌被鍨嬩簩锛氾紙娉ㄦ剰锛氫袱涓...
绛旓細鍥涘勾绾鏁板绠渚挎柟娉璁＄畻鍙ｈ瘈锛氬姞9瑕佸噺1锛屽姞8瑕佸噺2锛屽姞7瑕佸噺3锛屽姞6瑕佸噺4锛屽姞5瑕佸噺5绛夈傜畝渚胯繍绠楁槸灏忓鏁板璁＄畻棰樹腑鏈甯歌鐨勪竴绉嶃備粠瀛︾敓涓寮濮嬫帴瑙﹁绠楀氨浠庡悇涓笉鍚岀殑瑙掑害娓楅忎簡绠渚胯繍绠楃殑鎬濇兂锛屽埌浜嗗洓骞寸骇鍦ㄨ绠楅涓畝渚胯繍绠楀垯鍋氫负鐙珛鐨勯鍨嬫寮忓嚭鐜帮紝瀹冩槸璁＄畻棰樹腑鏈涓虹伒娲荤殑涓绉嶏紝鑳戒娇瀛︾敓...
绛旓細锛28*3+45*2-58*2锛/8锛堣绠楋級4524+82*3-57-23*4锛堣绠楋級23*56+47*56+18*56+12*56锛堣绠渚匡級101*89锛堣绠渚匡級25*9-25*3-25锛堣绠渚匡級99*25锛堣绠渚匡級13*12+13*28+13*60锛堣绠渚匡級17*51-17*23-9*17-4*17-5*17锛堣绠渚匡級256/4*2+459-263锛堣绠楋級25*锛8+4+2锛夛紙...
绛旓細鍥涘勾绾涓や綅鏁涔涓変綅鏁(1) 624 脳 17 = (2) 15 脳 914 = (3) 422 脳 74 = (4) 894 脳 45 = (5) 103 脳 80 = (6) 445 脳 32 = (7) 49 脳 958 = (8) 212 脳 25 = (9) 21 脳 498 = (10) 80 脳 857 = (11) 980 脳 69 = (12) 371 脳 16 = (13) 70 脳 569 = ...
绛旓細130*35 =130*70/2 =9100/2 =4550 鎴栵細130*35 =(100+30)*35 =3500+1050 =4550
绛旓細5824梅8脳(85-78) 840梅28+70脳1840涔13涔25 480闄や互32 120闄や互5闄や互438涔201 45涔97-7涔45 21涔41鍑21 35涔22鍔35涔36+35涔22 44涔198 125涔25涔8涔4095涔53鍔53 99涔125 45涔101鍑45 138-43-57-381.498+3972.502-3993.63-45-55+1374.125脳565.302脳99+3026.145脳89+145脳21 銆1銆475+...
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绛旓細7銆 瀛︾敓鍒樻柟闂暟瀛﹁佸笀寮犺佸笀鐨勫勾榫,寮犺佸笀璇;"鎴15骞村墠鐨勫瞾鏁板拰浣6骞村悗鐨勫瞾鏁扮浉鍚.7骞村墠,鎴戠殑宀佹暟鏄綘鐨8鍊." 璇蜂綘璁＄畻寮犺佸笀鐜板湪鐨勫勾榫?9銆 涓夋牴鑺界鍙互缁勬垚涓涓笁瑙掑舰锛屼笁鏍硅娊绛炬庝箞鎽嗗彲浠ョ粍鎴愬洓涓笁瑙掑舰锛10銆 浠庣敳鍦板埌涔欏湴锛屽叡1600绫筹紝鐢茬敤4灏忔椂锛屼箼鐢2灏忔椂銆傚鏋滃璧2灏...
