四年级上册简便运算 四年级数学简便计算有那些
\u56db\u5e74\u7ea7\u4e0b\u518c\u7b80\u4fbf\u8fd0\u7b97\u56db\u5e74\u7ea7\u4e0b\u518c\u7b80\u4fbf\u8fd0\u7b97
25x(4+8)
125x(8+8)
(11+25)x8
84x101
504x25
\u4e00\u3001\u4ea4\u6362\u5f8b\uff08\u5e26\u7b26\u53f7\u642c\u5bb6\u6cd5\uff09
\u5f53\u4e00\u4e2a\u8ba1\u7b97\u9898\u53ea\u6709\u540c\u4e00\u7ea7\u8fd0\u7b97\uff08\u53ea\u6709\u4e58\u9664\u6216\u53ea\u6709\u52a0\u51cf\u8fd0\u7b97\uff09\u53c8\u6ca1\u6709\u62ec\u53f7\u65f6\uff0c\u6211\u4eec\u53ef\u4ee5\u201c\u5e26\u7b26\u53f7\u642c\u5bb6\u201d\u3002\u9002\u7528\u4e8e\u52a0\u6cd5\u4ea4\u6362\u5f8b\u548c\u4e58\u6cd5\u4ea4\u6362\u5f8b\u3002
\u4f8b\uff1a256+78-56=256-56+78=200+78=278 450\u00d79\u00f750=450\u00f750\u00d79=9\u00d79=81
\u4e8c\u3001\u7ed3\u5408\u5f8b
\uff08\u4e00\uff09\u52a0\u62ec\u53f7\u6cd5
1.\u5f53\u4e00\u4e2a\u8ba1\u7b97\u9898\u53ea\u6709\u52a0\u51cf\u8fd0\u7b97\u53c8\u6ca1\u6709\u62ec\u53f7\u65f6\uff0c\u6211\u4eec\u53ef\u4ee5\u5728\u52a0\u53f7\u540e\u9762\u76f4\u63a5\u6dfb\u62ec\u53f7\uff0c\u62ec\u5230\u62ec\u53f7\u91cc\u7684\u8fd0\u7b97\u539f\u6765\u662f\u52a0\u8fd8\u662f\u52a0\uff0c\u662f\u51cf\u8fd8\u662f\u51cf\u3002\u4f46\u662f\u5728\u51cf\u53f7\u540e\u9762\u6dfb\u62ec\u53f7\u65f6\uff0c\u62ec\u5230\u62ec\u53f7\u91cc\u7684\u8fd0\u7b97\uff0c\u539f\u6765\u662f\u52a0\uff0c\u73b0\u5728\u5c31\u8981\u53d8\u4e3a\u51cf\uff1b\u539f\u6765\u662f\u51cf\uff0c\u73b0\u5728\u5c31\u8981\u53d8\u4e3a\u52a0\u3002\uff08\u5373\u5728\u52a0\u51cf\u8fd0\u7b97\u4e2d\u6dfb\u62ec\u53f7\u65f6\uff0c\u62ec\u53f7\u524d\u662f\u52a0\u53f7\uff0c\u62ec\u53f7\u91cc\u4e0d\u53d8\u53f7\uff0c\u62ec\u53f7\u524d\u662f\u51cf\u53f7\uff0c\u62ec\u53f7\u91cc\u8981\u53d8\u53f7\u3002\uff09
\u4f8b\uff1a345-67-33=345-\uff0867+33\uff09=345-100=245 789-133+33=789-\uff08133-33\uff09=789-100=689
2.\u5f53\u4e00\u4e2a\u8ba1\u7b97\u9898\u53ea\u6709\u4e58\u9664\u8fd0\u7b97\u53c8\u6ca1\u6709\u62ec\u53f7\u65f6\uff0c\u6211\u4eec\u53ef\u4ee5\u5728\u4e58\u53f7\u540e\u9762\u76f4\u63a5\u6dfb\u62ec\u53f7\uff0c\u62ec\u5230\u62ec\u53f7\u91cc\u7684\u8fd0\u7b97\uff0c\u539f\u6765\u662f\u4e58\u8fd8\u662f\u4e58\uff0c\u662f\u9664\u8fd8\u662f\u9664\u3002\u4f46\u662f\u5728\u9664\u53f7\u540e\u9762\u6dfb\u62ec\u53f7\u65f6\uff0c\u62ec\u5230\u62ec\u53f7\u91cc\u7684\u8fd0\u7b97\uff0c\u539f\u6765\u662f\u4e58\uff0c\u73b0\u5728\u5c31\u8981\u53d8\u4e3a\u9664\uff1b\u539f\u6765\u662f\u9664\uff0c\u73b0\u5728\u5c31\u8981\u53d8\u4e3a\u4e58\u3002\uff08\u5373\u5728\u4e58\u9664\u8fd0\u7b97\u4e2d\u6dfb\u62ec\u53f7\u65f6\uff0c\u62ec\u53f7\u524d\u662f\u4e58\u53f7\uff0c\u62ec\u53f7\u91cc\u4e0d\u53d8\u53f7\uff0c\u62ec\u53f7\u524d\u662f\u9664\u53f7\uff0c\u62ec\u53f7\u91cc\u8981\u53d8\u53f7\u3002\uff09
\u4f8b\uff1a510\u00f717 \u00f73=51\u00f7\uff0817\u00d73\uff09=510\u00f751=10 1200\u00f748\u00d74=1200\u00f7\uff0848\u00f74\uff09=1200\u00f712=100
\uff08\u4e8c\uff09\u53bb\u62ec\u53f7\u6cd5
1.\u5f53\u4e00\u4e2a\u8ba1\u7b97\u9898\u53ea\u6709\u52a0\u51cf\u8fd0\u7b97\u53c8\u6709\u62ec\u53f7\u65f6\uff0c\u6211\u4eec\u53ef\u4ee5\u5c06\u52a0\u53f7\u540e\u9762\u7684\u62ec\u53f7\u76f4\u63a5\u53bb\u6389\uff0c\u539f\u6765\u662f\u52a0\u73b0\u5728\u8fd8\u662f\u52a0\uff0c\u662f\u51cf\u8fd8\u662f\u51cf\u3002\u4f46\u662f\u5c06\u51cf\u53f7\u540e\u9762\u7684\u62ec\u53f7\u53bb\u6389\u65f6\uff0c\u539f\u6765\u62ec\u53f7\u91cc\u7684\u52a0\uff0c\u73b0\u5728\u8981\u53d8\u4e3a\u51cf\uff1b\u539f\u6765\u662f\u51cf\uff0c\u73b0\u5728\u5c31\u8981\u53d8\u4e3a\u52a0\u3002\uff08\u73b0\u5728\u6ca1\u6709\u62ec\u53f7\u4e86\uff0c\u53ef\u4ee5\u5e26\u7b26\u53f7\u642c\u5bb6\u4e86\u54c8) \uff08\u6ce8\uff1a\u53bb\u62ec\u53f7\u662f\u6dfb\u52a0\u62ec\u53f7\u7684\u9006\u8fd0\u7b97\uff09
2.\u5f53\u4e00\u4e2a\u8ba1\u7b97\u9898\u53ea\u6709\u4e58\u9664\u8fd0\u7b97\u53c8\u6709\u62ec\u53f7\u65f6\uff0c\u6211\u4eec\u53ef\u4ee5\u5c06\u4e58\u53f7\u540e\u9762\u7684\u62ec\u53f7\u76f4\u63a5\u53bb\u6389\uff0c\u539f\u6765\u662f\u4e58\u8fd8\u662f\u4e58\uff0c\u662f\u9664\u8fd8\u662f\u9664\u3002\u4f46\u662f\u5c06\u9664\u53f7\u540e\u9762\u7684\u62ec\u53f7\u53bb\u6389\u65f6\uff0c\u539f\u6765\u62ec\u53f7\u91cc\u7684\u4e58\uff0c\u73b0\u5728\u5c31 \u8981\u53d8\u4e3a\u9664\uff1b\u539f\u6765\u662f\u9664\uff0c\u73b0\u5728\u5c31\u8981\u53d8\u4e3a\u4e58\u3002\uff08\u73b0\u5728\u6ca1\u6709\u62ec\u53f7\u4e86\uff0c\u53ef\u4ee5\u5e26\u7b26\u53f7\u642c\u5bb6\u4e86\u54c8) \uff08\u6ce8\uff1a\u53bb\u6389\u62ec\u53f7\u662f\u6dfb\u52a0\u62ec\u53f7\u7684\u9006\u8fd0\u7b97\uff09
\u4e09\u3001\u4e58\u6cd5\u5206\u914d\u5f8b
1.\u5206\u914d\u6cd5 \u62ec\u53f7\u91cc\u662f\u52a0\u6216\u51cf\u8fd0\u7b97\uff0c\u4e0e\u53e6\u4e00\u4e2a\u6570\u76f8\u4e58\uff0c\u6ce8\u610f\u5206\u914d\u3002
\u4f8b\uff1a45\u00d7\uff0810+2\uff09=45\u00d710+45\u00d72=450+90=540
2.\u63d0\u53d6\u516c\u56e0\u5f0f \u6ce8\u610f\u76f8\u540c\u56e0\u6570\u7684\u63d0\u53d6\u3002
\u4f8b\uff1a35\u00d778+22\u00d735=35\u00d7(78+22)=35\u00d7100=3500 \u8fd9\u91cc35\u662f\u76f8\u540c\u56e0\u6570\u3002
3.\u6ce8\u610f\u6784\u9020\uff0c\u8ba9\u7b97\u5f0f\u6ee1\u8db3\u4e58\u6cd5\u5206\u914d\u5f8b\u7684\u6761\u4ef6\u3002
\u4f8b\uff1a45\u00d799+45=45\u00d799+45\u00d71=45\u00d7\uff0899+1\uff09=45\u00d7100=4500
\u56db\u3001\u501f\u6765\u8fd8\u53bb\u6cd5
\u770b\u5230\u540d\u5b57\uff0c\u5c31\u77e5\u9053\u8fd9\u4e2a\u65b9\u6cd5\u7684\u542b\u4e49\u3002\u7528\u6b64\u65b9\u6cd5\u65f6\uff0c\u9700\u8981\u6ce8\u610f\u89c2\u5bdf\uff0c\u53d1\u73b0\u89c4\u5f8b\u3002\u8fd8\u8981\u6ce8\u610f\u8fd8\u54e6 ,\u6709\u501f\u6709\u8fd8\uff0c\u518d\u501f\u4e0d\u96be\u3002
\u4f8b\uff1a9999+999+99+9=10000+1000+100+10-4=11110-4=11106
\u4e94\u3001\u62c6\u5206\u6cd5
\u987e\u540d\u601d\u4e49\uff0c\u62c6\u5206\u6cd5\u5c31\u662f\u4e3a\u4e86\u65b9\u4fbf\u8ba1\u7b97\u628a\u4e00\u4e2a\u6570\u62c6\u6210\u51e0\u4e2a\u6570\u3002\u8fd9\u9700\u8981\u638c\u63e1\u4e00\u4e9b\u201c\u597d\u670b\u53cb\u201d\uff0c\u5982\uff1a2\u548c5\uff0c4\u548c5\uff0c2\u548c25\uff0c4\u548c25\uff0c8\u548c125\u7b49\u3002\u5206\u62c6\u8fd8\u8981\u6ce8\u610f\u4e0d\u8981\u6539\u53d8\u6570\u7684\u5927\u5c0f\u3002
\u4f8b\uff1a32\u00d7125\u00d725=8\u00d74\u00d7125\u00d725=\uff088\u00d7125\uff09\u00d7\uff084\u00d725\uff09=1000\u00d7100=100000 125\u00d788=125\u00d7\uff088\u00d711\uff09=125\u00d78 \u00d711=1000\u00d78=8000 36\u00d725=9\u00d74\u00d725=9\u00d7\uff084\u00d725\uff09=9\u00d7100=900
(135+75)÷(14×5)
120-60÷5×5
1024÷16×3
(135+415)÷5+16
1200-20×18
720-720÷15
(360-144)÷24×3
240+480÷30×2
225-10×(6+13)
(120×2+120)÷9
164-13×5+85
330÷(65-50)
128-6×8÷16
64×(12+65÷13)
19×96-962÷74
10000-(59+66)×64
5940÷45×(798-616)
(315×40-364)÷7
12520÷8×(121÷11)
(2010-906)×(65+15)
(20+120÷24)×8
106×9-76×9
117÷13+36×15
3774÷37×(65+35)
540-(148+47)÷13
(308—308÷28)×11
(10+120÷24)×5
(238+7560÷90)÷14
21×(230-192÷4)
19×96-962÷74
10000-(59+66)×64
5940÷45×(798-616)
(315×40-364)÷7
735×(700-400÷25)
1520-(1070+28×2)
9405-2940÷28×21
920-1680÷40÷7 690+47×52-398
148+3328÷64-75
360×24÷32+730
2100-94+48×54
51+(2304-2042)×23
4215+(4361-716)÷81
(247+18)×27÷25
36-720÷(360÷18)
1080÷(63-54)×80
(528+912)×5-6178
绛旓細鍥涘勾绾т笂瀛︽湡绠渚胯繍绠鏈夊涓嬶細1銆24.6-3.98+5.4-6.02 24.6-3.98+5.4-6.02 =锛24.6+5.4锛-锛3.98+6.02锛=30-10 =20 2銆27脳17/26 27脳17/26 锛濓紙26锛1锛壝17/26 锛26脳17/26锛1脳17/26 锛17锛17/26 锛17鍙17/26 3銆528-99 528-99 =528-锛100-1锛=528-100+...
绛旓細3200闄や互64绠渚胯绠锛3200梅64 =3200梅32梅2 =100梅2 =50
绛旓細绠渚胯绠鏂规硶锛1銆佸湪鍚岀骇杩愮畻涓紝鍙互浠绘剰浜ゆ崲鏁板瓧鐨勪綅缃紝浣嗚杩炵潃鍓嶉潰鐨勭鍙蜂竴璧蜂氦鎹傦紙鍔犳硶鎴栦箻娉曚氦鎹㈠緥锛2 銆佸湪鍚岀骇杩愮畻涓紝鍔犲彿鎴栦箻鍙峰悗闈㈠彲浠ョ洿鎺ユ坊鎷彿锛屽幓鎷彿銆傚噺鍙枫侀櫎鍙峰悗闈㈡坊鎷彿锛屽幓鎷彿锛屾嫭鍙烽噷闈㈢殑瑕佸彉鍙枫傦紙鍔犳硶鎴栦箻娉曠粨鍚堝緥锛3銆佸噾涓娉曪紝鍑戝崄娉曪紝鍑戠櫨娉曪紝鍑戝崈娉曪細鈥滃墠闈㈠噾涔濓紝鏈熬...
绛旓細10.1脳38.67-3.鍏勾绾т笂鍐100閬撶畝渚胯繍绠楅銆 9.9梅5.5浜骞寸骇涓婂唽绠渚胯繍绠300棰樺強绛旀銆 8.63脳25-0.脳 9.3脳10.1100閬撹В鏂圭▼棰樺甫绛旀銆 3.99梅0.梅8 0.99脳0.81+0.11脳9脳0.19鍏勾绾у彛绠楅(鍙婄瓟妗)銆 (5.23+5.23+5.23+5.23)0.25脳1.25脳0.67脳32鍏勾绾х畝渚胯绠楅60閬撱 2.49脳3.8+0.脳62浜斿勾绾ц劚寮忚绠楀甫...
绛旓細杩愮敤鎻愬彇鍏洜鏁扮殑鏂规硶锛屽叕寮忥細ac+ab=a(b+c)锛屾彁鍙栧叕鍥犳暟2.5锛1.2鍜0.8鐩稿姞姝ｅソ鍑戞暣鏁帮紝浣垮緱杩愮畻绠渚銆1.2脳2.5+0.8脳2.5 =锛1.2+0.8锛壝2.5 =2脳2.5 =5 4銆2.96脳40 姝ら鍏堝埄鐢ㄤ箻娉曞垎閰嶅緥锛屾妸2.96脳40杞崲鎴29.6x4锛屽啀鍒╃敤涔樻硶缁撳悎寰嬫潵绠渚胯绠銆2.96脳40 =29.6x4 =...
绛旓細绠渚胯绠鏂规硶锛1銆佸湪鍚岀骇杩愮畻涓紝鍙互浠绘剰浜ゆ崲鏁板瓧鐨勪綅缃紝浣嗚杩炵潃鍓嶉潰鐨勭鍙蜂竴璧蜂氦鎹傦紙鍔犳硶鎴栦箻娉曚氦鎹㈠緥锛夈2 銆佸湪鍚岀骇杩愮畻涓紝鍔犲彿鎴栦箻鍙峰悗闈㈠彲浠ョ洿鎺ユ坊鎷彿锛屽幓鎷彿銆傚噺鍙枫侀櫎鍙峰悗闈㈡坊鎷彿锛屽幓鎷彿锛屾嫭鍙烽噷闈㈢殑瑕佸彉鍙枫傦紙鍔犳硶鎴栦箻娉曠粨鍚堝緥锛夈3銆佸噾涓娉曪紝鍑戝崄娉曪紝鍑戠櫨娉曪紝鍑戝崈娉曪細鈥滃墠闈㈠噾涔...
绛旓細渚嬪瓙婕旂ず鍥涘勾绾т笂鍐岀畝渚挎柟娉曡绠119脳21-21脳19 瑙ｉ鎬濊矾:绠渚胯绠楅氳繃杩愮敤涔樻硶瀹氬緥鍙婇櫎娉曟ц川缁勫悎浠ヨ揪鍒版柟渚胯绠楃殑杩囩▼,閫氳繃璇ヨ繃绋嬪彲浠ヤ娇涓涓鏉傜殑寮忓瓙鍙樺緱鏇村鏄撹绠,瑙ｉ杩囩▼:119脳21-21脳19 =锛119-19锛壝21 =100脳21 =2100 瀛樼枒璇疯拷闂,婊℃剰璇烽噰绾 ...
绛旓細灏忓鍥涘勾绾х畝渚胯绠棰樺ぇ鍏ㄥ強绛旀 渚1銆5.76锛13.67锛4.24锛6.33 =锛5.76锛4.24锛夛紜(13.67锛6.33)=10锛10 =20 渚2銆37.24锛23.79锛17.24 =37.24锛17.24锛23.79 =20锛23.79 =43.79 渚3銆 4脳3.78脳0.25 =4脳0.25脳3.78 =1脳3.78 =3.78 渚4銆 125脳246脳0.8...
绛旓細鍥涘勾绾鏁板绠渚胯繍绠鏂规硶锛氬垎閰嶆硶銆佹彁鍙栧叕鍥犲紡銆佷氦鎹㈠緥锛堝甫绗﹀彿鎼娉曪級銆佸熸潵杩樺幓娉曘1銆佸垎閰嶆硶 鎷彿閲屾槸鍔犳垨鍑忚繍绠椾笌鍙︿竴涓暟鐩镐箻锛45脳锛10+2锛=45脳10+45脳2=450+90=540銆2銆佹彁鍙栧叕鍥犲紡 娉ㄦ剰鐩稿悓鍥犳暟鐨勬彁鍙栵紝渚嬶細35脳78+22脳35=35脳锛78+22锛=35脳100=3500锛岃繖閲35鏄浉鍚屽洜鏁般3銆佷氦鎹...
绛旓細濡傦紱302+76=300+76+2锛298-188=300-188-2锛岀瓑銆傦紙涓冿級璁ょ湡瑙傚療鏌愰」涓0鎴1鐨勮繍绠椼傚锛7.93+2.07脳(4.5-4.5)绛夈傛荤殑璇存潵锛绠渚胯繍绠鐨勬濊矾鏄細锛1锛夎繍鐢ㄨ繍绠楃殑鎬ц川銆佸畾寰嬬瓑銆傦紙2锛夊彲鑳芥墦涔卞父瑙勭殑璁＄畻椤哄簭銆傦紙3锛夋媶鏁版垨杞寲鏃讹紝鏁扮殑澶у皬涓嶈兘鏀瑰彉銆傦紙4锛夋纭鐞嗗ソ姣忎竴姝ョ殑琛旀帴銆
