24乘以25的简便计算 25×24用简便方法计算怎么算
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\u00d724=600\u3002
\u5206\u6790\u8fc7\u7a0b\u5982\u4e0b\uff1a
\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
\u4e58\u6cd5\uff1a
1\uff09\u4e58\u6cd5\u4ea4\u6362\u5f8b\uff1aa*b=b*a
2\uff09\u4e58\u6cd5\u7ed3\u5408\u5f8b\uff1aa*b*c=(a*b)*c=a*(b*c)
3\uff09\u4e58\u6cd5\u5206\u914d\u5f8b\uff1a\uff08a+b\uff09*c=a*c+b*c\uff1b\uff08a-b\uff09*c=a*c-b*c
\u9664\u6cd5\uff1a
1\uff09\u5546\u4e0d\u53d8\u7684\u6027\u8d28\u5373\u88ab\u9664\u6570\u4e0e\u9664\u6570\u540c\u4e58\u4ee5\u6216\u540c\u9664\u4ee5\u4e00\u4e2a\u6570\uff08\u96f6\u9664\u5916\uff09\uff0c\u5546\u4e0d\u53d8\u3002
a/b=(a*n)/(b*n)=(a/n)/(b/n)
2\uff09\u4e24\u4e2a\u6570\u7684\u548c\uff08\u5dee\uff09\u9664\u4ee5\u4e00\u4e2a\u6570\uff0c\u53ef\u4ee5\u7528\u8fd9\u4e2a\u6570\u5206\u522b\u53bb\u9664\u8fd9\u4e24\u4e2a\u6570\uff08\u5728\u90fd\u80fd\u6574\u9664\u7684\u60c5\u51b5\u4e0b\uff09\uff0c\u518d\u6c42\u4e24\u4e2a\u5546\u7684\u548c\uff08\u5dee\uff09\u3002
\uff08a+b\uff09/c=a/c+b/c\uff1b\uff08a-b\uff09/c=a/c-b/c
图片里
图片
g
＝（20+4）*25
＝20*25+4*25
＝500+100
＝600
＝6*（4*25）
＝6*100
＝600
=25x4x6
=100x6
=600
绛旓細25*24 =25x4x6 =100x6 =600 鏈嬪弸锛岃閲囩撼姝ｇ‘绛旀锛屼綘浠彧鎻愰棶锛屼笉閲囩撼姝ｇ‘绛旀锛屽洖绛旈兘娌℃湁鍔诧紒锛侊紒鏈嬪弸锛岃銆愰噰绾崇瓟妗堛戯紝鎮ㄧ殑閲囩撼鏄垜绛旈鐨勫姩鍔涳紝濡傛灉娌℃湁鏄庣櫧锛岃杩介棶銆傝阿璋
绛旓細鎶24鎷嗘垚6涔樹互4锛岀劧鍚庢牴鎹涔樻硶缁撳悎寰嬪緱鍒:6脳锛4脳25锛=600銆傚叿浣撴楠ゅ涓
绛旓細25*24 =25*(4*6)=(25*4)*6 =100*6 =600
绛旓細鍥剧墖閲
绛旓細绠渚胯绠濡備笅 25脳24 =25脳4脳6 =100脳6 =600 鐪嬪埌25灏辨兂鍒4,鎶24鎷嗘垚4脳6,25脳4姝ｅソ绛変簬100銆
绛旓細24X25=(20鍗4)鈪25=20鈪25鍗4X25=500鍗100=600銆
绛旓細瑙:绗竴绉嶆柟娉曞彲浠ヨ繍鐢ㄤ箻娉曞垎閰嶅緥灏24鍖栦负6x4锛岀劧鍚庤繍鐢ㄤ箻娉曠粨鍚堝緥鍏璁＄畻4鈪25锛屽啀灏嗗畠浠殑绉悓6鐩镐箻銆傝绠楄繃绋 24鈪25 =6鈪(4x25)=6x100 =600銆傜浜岀鏂规硶鍙互杩愮敤鎷嗗垎娉曞皢24鍒嗚В涓(20+4)鍒嗗埆涔樹互25锛岀劧鍚庡皢瀹冧滑鐨勭Н鐩稿姞銆傝绠楄繃绋 24鈪25 =(20+4)鈪25 =500+100 =600銆
绛旓細杩欓亾棰樻垜浠渶瑕佹妸24鍒嗚В鎴4鍜6鐨勭Н锛屾垜浠煡閬25鍜4鐨勭Н鍒氬ソ鏄100锛岃繖鏍峰氨濂璁＄畻浜嗭細25脳24 =25脳4脳6 =100脳6 =600 鎵浠ヨ棰樼瓟妗堝氨鏄600锛屾湜瀵规偍鐨勯棶棰樻湁鎵甯姪銆
绛旓細鍙互鎶24鐪嬫垚鏄6脳4锛岀劧鍚庡啀鐢ㄤ箻娉缁撳悎寰璁＄畻姣旇緝绠渚锛600銆傛楠ゅ涓嬪浘:
