小学数学简便运算分类 请归纳小学数学简便计算的几种方法
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2\u3001125\u00d77\u00d764\u00f78\uff1d
3\u30011+2-3+4+5-6+7+8-9+10+11-12+\u2026\u2026+58+59-60\uff1d
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1\u3001123+234+345+456+567+678=
2\u30014999+499+49=
3\u300125\u00d7\uff08877+872+871+876\uff09\uff1d
4\u3001888\u00d7\uff0899+25+1\uff09\uff1d
5\u300165\u00d7128+174\u00d765\uff0d65\u00d7202\uff1d
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1\uff0e =_________ \u3002
2\uff0e =_________ \u3002
3. =_________ \u3002
4\uff0e =_________ \u3002
5\uff0e\uff08123456+234561+345612+456123+561234+612345\uff09\u00f77 =_________ \u3002
6\uff0e =_________ \u3002
7\uff0e=______ \u3002
8\uff0e =_________ \u3002
9\uff0e[26\u00d7\uff086-2.5\uff09\u00f70.5-25]\u00d70.2 =_________ \u3002
10\uff0e =_________ \u3002
11\uff0e =_________ \u3002
12\uff0e =_________ \u3002
13\uff0e =_________ \u3002
14\uff0e =_________ \u3002
15\uff0e =_________ \u3002
16\uff0e \u25a1 \uff0c\u25a1=_________ \u3002
17\uff0e =_________ \u3002
18\uff0e =_________\u3002
19\uff0e =_________ \u3002
20\uff0e =_________ \u3002
21\uff0e =_________ \u3002
22\uff0e =_________ \u3002
23\uff0e =_________ \u3002
24\uff0e\u8bbeN= \uff0c\u5219N\u7684\u5404\u4f4d\u6570\u5b57\u4e4b\u548c\u4e3a_________ \u3002
25\uff0e{ \u00d7\u25a1} =59\uff0c\u25a1=_________ 1\uff0e202-192+182-172+\u2026+22-12 =_________ \u3002
2\uff0e\uff08112233-112.233\uff09\u00f7(224466-224.466) =_________ \u3002
3. =_________ \u3002
4\uff0e =_________ \u3002
5\uff0e =_________ \u3002
6\uff0e =_________ \u3002
7\uff0e\u4e58\u79ef \u7684\u5404\u4f4d\u6570\u5b57\u4e4b\u548c\u662f =______ \u3002
8\uff0e =_________ \u3002
9\uff0e =_________ \u3002
10\uff0e\uff081234567891\uff092-1234567890\u00d71234567892 =_________ \u3002
11\uff0e =_________ \u3002
12\uff0e =_________ \u3002
13\uff0e =_________ \u3002
14\uff0e =_________ \u3002
15\uff0e =_________ \u3002
16\uff0eA=1999\u00d71+1999\u00d72+1999\u00d73+\u2026+1999\u00d71999\uff0cA\u88ab9\u9664\u4f59\u6570\u662f_________ \u3002
17\uff0e =_________ \u3002
18\uff0e =_________\u3002
19\uff0e1\u00f7(2\u00f73)\u00f7(3\u00f74)\u00f7(4\u00f75)\u00f7(5\u00f76)\u00f7(6\u00f77)\u00f7(7\u00f78)\u00f7(8\u00f79) =_________ \u3002
20\uff0e \u7684\u6574\u6570\u90e8\u5206\u662f_________ \u3002
21\uff0eA = \uff0c\u90a3\u4e48100A\u7684\u6574\u6570\u90e8\u5206\u662f_________ \u3002
22\uff0e =_________ \u3002
23\uff0e =_________ \u3002
24\uff0e =_________ \u3002
25\uff0e\u82e5 \uff0c\u90a3\u4e48\u56db\u4e2a\u25a1\u4e2d\u7684\u6570\u7684\u4e58\u79ef\u4e3a_________ 1\uff0e91.5+88.8+90.2+270.4+89.6+186.7+91.8=_________\u3002
2\uff0e123+234+345-456+567+678+789-890=_________\u3002
3\uff0e1993-1+2-3+4-5+...+1948-1949=_________\u3002
4\uff0e93+87+88+79+100+62+75+95+85+69+72+98+89+77+54+75+92+85+83+76+
65+60+79+86+100+49+97+97+80+78= _________\u3002
5\uff0e0.0625+0.125+0.1875+0.25+0.3125+0.375+0.4375+0.5+0.5625+0.625
+0.6875+0.75+0.8125+0.875+0.9375=_____\u3002
1\uff0e1234+2341+3412+4123=______\u3002
2\uff0e101+103+107+109+113+127+131+137+139+149+151=______\u3002
3\uff0e569+384+147-328-167-529=______\u3002
4\uff0e124.68+324.68+524.68+724.68+924.68=______\u3002
5\uff0e207.2+389.7-157.6-109.1=______\u3002
6\uff0e1994+1993-1992+1991+1990+1989-1988-1987+\u2026\u2026+10+9-8-7+6+5-4-3+2+1=______\u3002
7\uff0e=______\u3002
8\uff0e=______\u3002
9\uff0e 3.1416\u00d72.7183=______\u3002
10\uff0e5795.5795\u00f75.795\u00d7579.5=______\u3002
11\uff0e2\u00d73\u00d75\u00d77\u00d711\u00d713=______\u3002
12\uff0e(11\u00d710\u00d79\u2026\u2026\u00d73\u00d72\u00d71)\u00f7(22\u00d724\u00d725\u00d727)=______\u3002
13\uff0e2.89\u00d76.37+4.63\u00d72.89=______\u3002
14\uff0e327\u00d72.8+17.3\u00d728=______\u3002
15\uff0e=______\u3002
16\uff0e=______\u3002
17\uff0e=______\u3002
18. (111\u00d758-148\u00d716)\u00f737=______\u3002
19\uff0e=______\u3002
20\uff0e=______\u3002
21\uff0e3.75\u00d74.23\u00d736-125\u00d70.423\u00d72.8=______\u3002
22\uff0e66666\u00d710001+66666\u00d76666=______\u3002
23\uff0e=____\u3002
24\uff0e=______\u3002
25\uff0e=______\u3002 1\uff0e1234\u00d7900914=_______ \u3002
2\uff0e2424.2424\u00f7 242.4=_______ \u3002
3\uff0e123455+234566+345677+456788+567899=_______ \u3002
4\uff0e376+385+391+380+377+389+383+374+366+378=_______ \u3002
5\uff0e8642-7531+6420-5317+4280-3157+2084-1753=_______ \u3002
6\uff0e6472-\uff084476-2480\uff09+5319-\uff083323-1327\uff09+9354-\uff087358-5326\uff09+6839-\uff084843-2847\uff09=______ \u3002
7\uff0e567\u00d7142+426\u00d7811-852050=_______ \u3002
8\uff0e21356\u00f721356 =_______ \u3002
9\uff0e1996+1994-1992-1990+1998+1986-1984-1982+1980+1978-1976-1974+1972+1970 \u2026+4+2=_______ \u3002
10\uff0e2375\u00d73987+9207\u00d76013+3987\u00d76832=_______ \u3002
11\uff0e12345679\u00d7810=_______ \u3002
12\uff0e28\u00d75+2\u00d74\u00d735+21\u00d720+14\u00d740+8\u00d762=_______ \u3002
13\uff0e30\u00d7\uff08 \uff09=_______ \u3002
14\uff0e6985\u00d77138-1985\u00f7 -2564\u00f7 =_______ \u3002
15\uff0e +0.8361-0.9375+0.973-5.125+5 +0.7246+0.027-2.1875+0.2754- 5 +0.582+7.357- +0.418+0.1639=_______ \u3002
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1）加法，238+456=240+454=694（把456的2移到238凑出10来）
2）乘法，36*55=（4*5）*（9*11）=20*99=1980
（把36的因数中的4和55的因数中的5先提出来先乘，凑出20来，其余相乘）
加法交换律：a+b=b+a
加法结合律;a+b+c=a+(b+c)
乘法交换律：a*b=b*a
乘法结合律：a*b*c=a*(b*c)
乘法分配律
ab+ac=a(b+c)
一个数连续减两个数，可以减这两个数的和：
a-b-c=a-(b+c)
一个数连续除以两个数，可以除以这两个数的积：
a/b/c=a/(b*c)小学阶段的简便计算定律就这些。
绛旓細灏忓鏁板绠渚胯繍绠楁柟娉曞綊绫 1銆佸甫绗﹀彿鎼娉锛堟牴鎹細鍔犳硶浜ゆ崲寰鍜屼箻娉曚氦鎹㈢巼锛夊綋涓涓绠楅鍙湁鍚屼竴绾ц繍绠楋紙鍙湁涔橀櫎鎴栧彧鏈夊姞鍑忚繍绠楋級鍙堟病鏈夋嫭鍙锋椂锛屾垜浠彲浠モ滃甫 绗﹀彿鎼鈥濄(a+b+c=a+c+b,a+b-c=a-c+b,a-b+c=a+c-b,a-b-c=a-c-b;a脳b脳c=a脳c脳b,a梅b梅c=a梅c梅b,a...
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绛旓細9999+999+99+9 =9999+1+999+1+99+1+9+1鈥4 2銆佹媶鍒嗘硶 椤惧悕鎬濅箟锛屾媶鍒嗘硶灏辨槸涓轰簡鏂逛究璁＄畻鎶婁竴涓暟鎷嗘垚鍑犱釜鏁般傝繖闇瑕佹帉鎻′竴浜涒滃ソ鏈嬪弸鈥濓紝濡傦細2鍜5锛4鍜5锛2鍜2.5锛4鍜2.5锛8鍜1.25绛夈傚垎鎷嗚繕瑕佹敞鎰忎笉瑕佹敼鍙樻暟鐨勫ぇ灏忓摝銆備緥濡傦細3.2脳12.5脳25 =8脳0.4脳12.5脳25 =8脳12....
绛旓細灏忓鏁板绠渚胯繍绠楃殑鏂规硶鍜屾妧宸э細1銆佸噾鏁存硶锛氳繖绉嶆柟娉曟槸鏈鍩烘湰鐨勭畝渚胯繍绠锛岄氳繃灏嗗叾浠栨暟瀛楄浆鍖栨垚涓庢煇涓暟瀛楃浉鍔犳垨鐩稿噺锛岃揪鍒板揩閫熻绠楃殑鐩殑銆2銆佸垎瑙ｆ硶锛氳繖绉嶆柟娉曟槸灏嗕竴涓暟鍒嗚В鎴愬嚑涓暟鐩稿姞鎴栫浉鍑忥紝鐒跺悗鍐嶇敤缁撳悎娉曡繘琛岀畝渚胯繍绠椼3銆佺粨鍚堟硶锛氳繖绉嶆柟娉曟槸鍦ㄥ皢鏁板瓧鍒嗚В鐨勫熀纭涓婏紝灏嗗彲浠ュ噾鏁寸殑鏁板瓧鏀惧湪涓璧凤紝...
绛旓細鍔犳硶缁撳悎寰;a+b+c=a+(b+c)涔樻硶浜ゆ崲寰嬶細a*b=b*a 涔樻硶缁撳悎寰嬶細a*b*c=a*(b*c)涔樻硶鍒嗛厤寰 ab+ac=a(b+c)涓涓暟杩炵画鍑忎袱涓暟锛屽彲浠ュ噺杩欎袱涓暟鐨勫拰锛歛-b-c=a-(b+c)涓涓暟杩炵画闄や互涓や釜鏁帮紝鍙互闄や互杩欎袱涓暟鐨勭Н锛歛/b/c=a/(b*c)灏忓闃舵鐨绠渚胯绠瀹氬緥灏辫繖浜涖
绛旓細鍔犳硶缁撳悎寰;a+b+c=a+(b+c)涔樻硶浜ゆ崲寰嬶細a*b=b*a 涔樻硶缁撳悎寰嬶細a*b*c=a*(b*c)涔樻硶鍒嗛厤寰 ab+ac=a(b+c)涓涓暟杩炵画鍑忎袱涓暟锛屽彲浠ュ噺杩欎袱涓暟鐨勫拰锛歛-b-c=a-(b+c)涓涓暟杩炵画闄や互涓や釜鏁帮紝鍙互闄や互杩欎袱涓暟鐨勭Н锛 a/b/c=a/(b*c)灏忓闃舵鐨绠渚胯绠瀹氬緥灏辫繖浜涖
绛旓細灏忓鏁板涓湁寰堝绠渚胯繍绠鐨勬柟娉曪紝浠ヤ笅鏄竴浜涘父瑙佺殑鏂规硶锛1.鎻愬彇鍏洜寮忔硶锛氬皢鐩稿悓鍥犳暟鎻愬彇鍑烘潵锛岃冭瘯涓線寰鍓╀笅鐨勯」鐩稿姞鍑忥紝浼氬嚭鐜颁竴涓暣鏁般備緥濡傦細0.92脳1.41锛0.92脳8.59=0.92脳锛1.41+8.59锛夈2.鍊熸潵鍊熷幓娉曪細鐢ㄦ鏂规硶鏃讹紝闇瑕佹敞鎰忚瀵燂紝鍙戠幇瑙勫緥銆傝冭瘯涓紝鐪嬪埌鏈夌被浼998銆999鎴栬1.98绛...
绛旓細鍋灏忓鏁板浣滀笟瀹炵敤鐨绠渚胯繍绠鏂规硶 绠渚胯绠涓夊瓧缁 鍋氱畝绠楋紝鏄韩鍙椼傜粏瑙傚療锛屾壘鐗圭偣銆傝繛缁姞锛岀粨瀵瑰瓙銆傝繛缁箻锛屾壘鏈嬪弸銆傝繛缁噺锛屽噺鍘诲拰銆傝繛缁櫎锛岄櫎浠ョН銆傚噺鍘诲拰锛屽彲杩炲噺銆傞櫎浠ョН锛屽彲杩為櫎銆備箻鍜屽樊锛屽垎鍒箻銆傜Н鍔犲噺锛岃帿鎱屽紶锛屽悓鍥犳暟锛屾彁鍑烘潵锛屽紓鍥犳暟锛屾嫭鍙锋斁銆傚悓绾х畻锛屽彲浜ゆ崲銆傜壒娈婃暟锛屽阀鎷嗗垎銆傚悎鐞嗙畻...
绛旓細灏忓鏁板绠渚胯繍绠楀綊绫绘槑纭細1銆佷竴鑸儏鍐典笅锛屽洓鍒欒繍绠楃殑璁＄畻椤哄簭鏄細鏈夋嫭鍙锋椂锛屽厛绠楁嫭鍙烽噷闈㈢殑锛涘彧鏈夊悓涓绾ц繍绠楁椂锛屼粠宸﹀線鍙筹紱鍚湁涓ょ骇杩愮畻锛屽厛绠椾箻闄ゅ悗绠楀姞鍑忋2銆佺敱浜庢湁鐨勮绠楅鍏锋湁瀹冭嚜韬殑鐗瑰緛锛岃繖鏃惰繍鐢ㄨ繍绠楀畾寰嬶紝鍙互浣胯绠楄繃绋嬬畝鍗曪紝鍚屾椂鍙堜笉瀹规槗鍑洪敊銆鍔犳硶浜ゆ崲寰锛歛+b=b+a 涔樻硶浜ゆ崲寰嬶細a脳b=...
绛旓細鏁板绠渚胯绠鏂规硶锛氫竴銆佽繍鐢ㄤ箻娉曞垎閰嶅緥绠渚胯绠 绠渚胯绠椾腑鏈甯哥敤鐨勬柟娉曟槸涔樻硶鍒嗛厤寰嬨備箻娉曞垎閰嶅緥鎸囩殑鏄細ax(b+c)=axb+axc cx锛坅-b锛=axc-bxc 渚1锛38X101锛屾垜浠鎬庝箞鎷嗗憿锛熺湅璋佹洿鍔犵殑闈犺繎鏁寸櫨鎴栬呮暣鍗侊紝褰撶劧鏄101鏇村ソ浜涳紝閭ｆ垜浠氨鎶101鎷嗘垚100+1鍗冲彲銆38X101 =38X锛100+1锛=38X100+38X1...
