25x(4十8)简便计算法 25x（4十8）简便计算

\u7528\u7b80\u4fbf\u8ba1\u7b97\u6cd525x\uff084\u53418\uff09

25\u00d7(4+8)=25\u00d74+25\u00d78=100+200=300\u8fd9\u4e2a\u7b80\u4fbf\u65b9\u6cd5\u8ba1\u7b97\u9898\u8fd0\u7528\u5230\u4e86\u4e58\u6cd5\u5206\u914d\u5f8b\u6765\u8fdb\u884c\u8ba1\u7b97\uff0c\u5c31\u662fa\u00d7(b+c)=a\u00d7b+a\u00d7c\uff0c\u76f4\u63a5\u5e26\u8fd9\u4e2a\u516c\u5f0f\u5c31\u5f97\u5230\uff0c25\u00d74+25\u00d78\uff0c\u73b0\u5728\u5728\u6309\u7167\u56db\u5219\u6df7\u5408\u8fd0\u7b97\u7684\u987a\u5e8f\u8fdb\u884c\u8ba1\u7b97\uff0c\u56e0\u4e3a\u8fd9\u4e24\u4e2a\u56e0\u5f0f\u90fd\u662f\u7ecf\u5e38\u7528\u5230\u7684\u7b80\u4fbf\u65b9\u6cd5\u7684\u6570\u636e\uff0c\u6240\u4ee525\u00d74=100\uff0c25\u00d78=200\uff0c100+200=300\uff0c\u5229\u7528\u8fd9\u4e9b\u8fd0\u7b97\u5b9a\u5f8b\uff0c\u53ef\u4ee5\u8ba1\u7b97\u66f4\u52a0\u7b80\u4fbf\uff0c\u5e0c\u671b\u6211\u7684\u56de\u7b54\u80fd\u591f\u5e2e\u52a9\u5230\u4f60\uff0c\u795d\u4f60\u5b66\u4e60\u8fdb\u6b65\uff0c\u5fc3\u60f3\u4e8b\u6210\uff0c\u4e07\u4e8b\u5982\u610f\uff0c\u656c\u8bf7\u91c7\u7eb3\uff0c\u8c22\u8c22\uff01

25x\uff084+8\uff09

=25x4+25x8
=100+200
=300

25x(4+8)
=25x4+25x8
=100+200
=300

25鈺(8+4)绠渚胯绠
绛旓細25脳锛8+4锛=25脳4脳3 =100脳3 =300 浣犲ソ锛屾湰棰樺凡瑙ｇ瓟锛屽鏋滄弧鎰忥紝璇风偣鍙充笂瑙掆滈噰绾崇瓟妗堚濄

(48+4)脳25鎬庢牱绠渚胯绠?
绛旓細鍏充簬锛48+4锛脳25鐨绠渚瑙ｇ瓟锛岃缁嗙殑鎿嶄綔濡備笅锛氾紙48+4锛壝25 =52脳25 =52脳5脳5 =260脳5 =1300

绠渚胯绠銆48x25
绛旓細绠渚胯绠銆48x25=48x5x5=6x8x5x5=40x30=1200

25X(4鍗8)鈪25绠渚胯绠?
绛旓細25X(4鍗8)鈪25绠渚胯绠鏄 鍘熷紡=锛25x4+25x8锛墄25 =(100+200)x25 =300x25 =7500

25x248鐨绠渚胯繍绠?
绛旓細浜屽崄浜涔樹互鍥涘崄鍏緢瀹规槗璁＄畻銆= 25鍊(50姣2)=1250-50 =1200

25x(4+8)x125,绛変簬澶氬皯? 涓瀹氳鏄绠渚胯繍绠
绛旓細鍏蜂綋鍥炵瓟濡備笅锛25x锛4+8锛x125 =25脳4脳125+25脳8脳125 =100脳125+200脳125 =12500+25000 =37500 娣峰悎杩愮畻锛氬鏋滀竴绾ц繍绠楀拰浜岀骇杩愮畻锛屽悓鏃舵湁锛屽厛绠椾簩绾ц繍绠椼傚鏋滀竴绾э紝浜岀骇锛屼笁绾ц繍绠楋紙鍗充箻鏂广佸紑鏂瑰拰瀵规暟杩愮畻锛夊悓鏃舵湁锛屽厛绠椾笁绾ц繍绠楀啀绠楀叾浠栦袱绾с傚鏋滄湁鎷彿锛岃鍏绠楁嫭鍙閲岀殑鏁帮紙涓嶇瀹冩槸...

4X(25鍗8)鐨绠渚挎柟娉?
绛旓細绠渚胯绠杩囩▼鏂规硶濡備笅 瑙ｏ細4脳锛25+8锛=4脳25+8脳4 =100+32 =132

4x(25鍗8)鐨绠渚胯绠鑴卞紡璁＄畻?
绛旓細12.5脳32脳2.5绠鍗璁＄畻鐨勭粨鏋滄槸1000銆傝В:12.5脳32脳2.5 = 12.5 x(2x4x 4)x 2.5 =(12.5 x2)4x 4(4x 2.5)= 25x 4x 10 =(25x 4)X10 = 100 X10 = 1000锛屽嵆绠鍗曡绠楃殑缁撴灉鏄10000銆傛墿灞曚俊鎭:1銆傜畝鍗曡绠椾腑鐨杩愮畻娉曞垯(1)鍔犳硶鍜岀粍鍚堝畾寰(a b) c=a (b c)(2)鍔犳硶浜ゆ崲...

25x48鎬庝箞绠渚胯绠?
绛旓細宸х畻杩囩▼瑙ｆ瀽25脳48 瑙ｉ鎬濊矾:鍥鍒欒繍绠楄鍒(鎸夐『搴忚绠,鍏堢畻涔橀櫎鍚庣畻鍔犲噺,鏈夋嫭鍙峰厛绠楁嫭鍙,鏈変箻鏂瑰厛绠椾箻鏂)鍗宠劚寮杩愮畻(閫掔瓑寮璁＄畻)闇鍦ㄨ鍘熷垯鍓嶆彁涓嬭繘琛 瑙ｉ杩囩▼:25脳48 =25脳4脳12 =100脳12 =1200

閿欒В:25X(4鍗 8)浜25x4鍗8=100鍗8浜108
绛旓細鏈夊皬鎷彿鍜屼箻鍙凤紝鍏璁＄畻鎷彿鐨勫唴瀹癸紝鐒跺悗鍦ㄤ綔涔樻硶

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