25乘以25乘以256乘以25怎么用简便方法计算? 25×50+250×5乘以使用简便方法计算
25\u4e58\u4ee524\u7528\u7b80\u4fbf\u65b9\u6cd5\u8ba1\u7b97\u600e\u4e48\u7b97\u89e3\u6790\uff1a\u91c7\u7528\u62c6\u5206\u6cd5\uff0c\u7136\u540e\u6839\u636e\u4e58\u6cd5\u7ed3\u5408\u5f8b\u8fdb\u884c\u8ba1\u7b97\u5373\u53ef\u3002
25\u00d724
=25\u00d74\u00d76\uff08\u5c0624\u62c6\u5206\u62104\u00d76\uff09
=100\u00d76\uff08\u5c0625\u548c4\u76f8\u4e58\u5f97\u5230\u6574\u767e\u6570\uff0c\u4f7f\u8ba1\u7b97\u7b80\u5355\u5316\uff09
=600
\u4e58\u6cd5\u7ed3\u5408\u5f8b\u7528\u5b57\u6bcd\u8868\u793a\u4e3a(a\u00d7b)\u00d7c=a\u00d7(b\u00d7c)\uff0c\u5b83\u7684\u5b9a\u4e49\uff08\u65b9\u6cd5\uff09\u662f\uff1a\u4e09\u4e2a\u6570\u76f8\u4e58\uff0c\u5148\u628a\u524d\u4e24\u4e2a\u6570\u76f8\u4e58\uff0c\u518d\u548c\u7b2c\u4e09\u4e2a\u6570\u76f8\u4e58\uff1b\u6216\u5148\u628a\u540e\u4e24\u4e2a\u6570\u76f8\u4e58\uff0c\u518d\u548c\u7b2c\u4e00\u4e2a\u6570\u76f8\u4e58\uff0c\u79ef\u4e0d\u53d8\u3002
\u6269\u5c55\u8d44\u6599\uff1a\u7b80\u4fbf\u65b9\u6cd5\u8ba1\u7b97\u7684\u76f8\u5173\u5b9a\u5f8b
1\u3001\u52a0\u6cd5\u4ea4\u6362\u5f8b\uff1a\u4e24\u4e2a\u52a0\u6570\u4ea4\u6362\u4f4d\u7f6e\uff0c\u548c\u4e0d\u53d8\uff0c\u8fd9\u53eb\u505a\u52a0\u6cd5\u4ea4\u6362\u5f8b\u3002
\u5b57\u6bcd\u516c\u5f0f:a+b+c=a+c+b
2\u3001\u52a0\u6cd5\u7ed3\u5408\u5f8b\uff1a\u5148\u628a\u524d\u4e24\u4e2a\u6570\u76f8\u52a0\uff0c\u6216\u5148\u628a\u540e\u4e24\u4e2a\u6570\u76f8\u52a0\uff0c\u548c\u4e0d\u53d8\u53eb\u505a\u52a0\u6cd5\u7ed3\u5408\u5f8b\u3002
\u5b57\u6bcd\u516c\u5f0f:a+b+c=a+(b+c)
3\u3001\u4e58\u6cd5\u4ea4\u6362\u5f8b\uff1a\u4e24\u4e2a\u56e0\u6570\u4ea4\u6362\u4f4d\u7f6e\uff0c\u79ef\u4e0d\u53d8\u3002
\u5b57\u6bcd\u516c\u5f0f:a\u00d7b=b\u00d7a
4\u3001\u4e58\u6cd5\u7ed3\u5408\u5f8b\uff1a\u5148\u4e58\u524d\u4e24\u4e2a\u6570\uff0c\u6216\u5148\u4e58\u540e\u4e24\u4e2a\u6570\uff0c\u79ef\u4e0d\u53d8\u3002
\u5b57\u6bcd\u516c\u5f0f:a\u00d7b\u00d7c=a\u00d7(b\u00d7c)
5\u3001\u4e58\u6cd5\u5206\u914d\u5f8b\uff1a\u4e24\u4e2a\u6570\u7684\u548c\uff0c\u4e58\u4ee5\u4e00\u4e2a\u6570\uff0c\u53ef\u4ee5\u62c6\u5f00\u6765\u7b97\uff0c\u79ef\u4e0d\u53d8\u3002
\u5b57\u6bcd\u516c\u5f0f:(a+b)\u00d7c=a\u00d7c+b\u00d7c
6\u3001\u9664\u6cd5\u6027\u8d28\u7684\u6982\u5ff5\u4e3a\uff1a\u4e00\u4e2a\u6570\u8fde\u7eed\u9664\u4ee5\u4e24\u4e2a\u6570\uff0c\u53ef\u4ee5\u5148\u628a\u540e\u4e24\u4e2a\u6570\u76f8\u4e58\uff0c\u518d\u76f8\u9664\u3002
\u5b57\u6bcd\u516c\u5f0f:a\u00f7b\u00f7c=a\u00f7(b\u00d7c)
7\u3001\u5546\u4e0d\u53d8\u7684\u89c4\u5f8b
\u6982\u5ff5:\u88ab\u9664\u6570\u548c\u9664\u6570\u540c\u65f6\u4e58\u4e0a\u6216\u9664\u4ee5\u76f8\u540c\u7684\u6570(0\u9664\u5916)\u5b83\u4eec\u7684\u5546\u4e0d\u53d8\u3002
\u5b57\u6bcd\u516c\u5f0f:a\u00f7b=(an)\u00f7(bn)=(a\u00f7n)\u00f7(b\u00f7n) (n\u22600 b\u22600)
8\u3001\u51cf\u6cd5\u6027\u8d28\uff1a\u4e00\u4e2a\u6570\u8fde\u7eed\u51cf\u53bb\u4e24\u4e2a\u6570\uff0c\u7b49\u4e8e\u8fd9\u4e2a\u6570\u51cf\u53bb\u4e24\u4e2a\u6570\u7684\u548c\u3002
\u5b57\u6bcd\u516c\u5f0f:a-b-c=a-(b+c)
25\u00d750+250\u00d75
\u89e3\uff1a
25\u00d750+250\u00d75
=250\u00d75+250\u00d75
=250\u00d7\uff085+5\uff09
=250\u00d710
=2500
=25×25×(4×4×4×4)×25
=(25×4)×(25×4)×(25×4)×4
=100×100×100×4
=1000000×4
=4000000
解析:重点是分解256，然后应用乘法交换律和乘法结合律进行简算。
将256拆分成4×4×4×4的形式，再与25分别相乘。
25×25×256×25
＝25×4×25×4×25×4×4
＝100×100×100×4
＝4000000
＝
25*25*256*25
=25*25*25*4*4*4*4
=25*4*25*4*25*4*4
=100*100*100*4
=4000000
绛旓細256x256x25x16x3/8
绛旓細涔樹互256鏄负浜嗗皢璇昏繃鏉ョ殑鏁版嵁杞崲鎴愬崄杩涘埗鏁帮紝鍐嶄箻浠25锛岀劧鍚庡湪杩斿洖鍊奸噷鍙堝乏绉讳簡2锛岀浉褰撲簬(b*256+a)*0.0625*100锛佽繖娈电▼搴忓簲璇ユ病鏈夊垽鏂璐熺殑璇彞锛佷綘澶氱湅鐪婦S18B20鐨勬墜鍐屽氨浼氭槑鐧戒簡锛侀偅閲岄潰璇寸殑寰堟槑鐧界殑锛
绛旓細4涔樹互4绛変簬16銆16涔樹互16绛変簬256锛屽ソ浜4涔樹互5绛変簬20銆4涔樹互25绛変簬100銆16涔樹互25绛変簬400銆125涔樹互4绛変簬500銆125涔樹互16绛変簬2000绠鍗曞憖锛侊紒鍒嗚В寮绠楀緢绠鍗曪紒
绛旓細=257X5/257涓5/257=5涓5/257=1023/257
绛旓細瑙ｏ細25鈪256x125绛変簬锛 800000 锛夆埖宸茬煡闇姹傚嚭25鈪256x125绛変簬澶氬皯 鈭25 鈪 256 x 125 = 25 脳 锛4 脳 8 脳 8锛壝 125 = 25 脳 4 脳 8 脳 8 脳 125 = 锛25 脳 4锛壝 锛8 脳 125锛壝 8 = 100 脳 1000 脳 8 = 100000 脳 8 = 800000 绛旓細25鈪256x125绛変簬800000 ...
绛旓細25脳(256-252)鏄涔樻硶鍒嗛厤寰嬶紝涔熷氨鏄妸25鍒嗛厤缁256鍜252锛岀劧鍚庤繘琛岃绠椼
绛旓細:濡備笅鍥炬墍绀:
绛旓細25脳65鍗25脳256鎬庢牱绠楃畝渚匡紵25脳65鍗25脳256 =25*锛65+256锛=25*321 =8025
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绛旓細256闄や互25绛変簬10.24锛岀敤10.24涔25绛変簬256銆傞櫎娉曟槸鍥涘垯杩愮畻涔嬩竴銆傚凡鐭ヤ袱涓洜鏁扮殑绉笌鍏朵腑涓涓洜鏁帮紝姹傚彟涓涓洜鏁扮殑杩愮畻锛屽彨鍋氶櫎娉曘備袱涓暟鐩搁櫎鍙堝彨鍋氫袱涓暟鐨勬瘮銆傝嫢ab绛変簬c锛坆涓嶇瓑浜0锛夛紝鐢ㄧН鏁癱鍜屽洜鏁癰鏉ユ眰鍙︿竴涓洜鏁癮鐨勮繍绠楀氨鏄櫎娉曪紝鍐欎綔c闄や互b锛岃浣渃闄や互b锛堟垨b闄锛夈傚叾涓紝c鍙仛琚...
