25×8-80的简便计算? 25×37×80的简便计算?
25\u00d780\u00d74\u600e\u4e48\u7b80\u4fbf\u8ba1\u7b97\uff1f\u5148\u752825\u4e58\u4ee54\u7b49\u4e8e100\uff0c\u7136\u540e\u518d\u7528100\u4e58\u4ee580\uff0c\u5c31\u5f88\u5bb9\u6613\u5f97\u5230\u7b54\u6848\uff0c\u6ee1\u610f\u8bf7\u91c7\u7eb3\u3002
\u4f60\u597d\uff0c\u7b80\u4fbf\u8ba1\u7b97\u662f
25*80*37
=2000*37
=74000
\u5e0c\u671b\u53ef\u4ee5\u5e2e\u5230\u4f60\u3002
=25×8-8×10
=8×(25-10)
=8×15
=120
25X8-80=25X8一8x10=8x(25一10)=8x15=120
25*8—80
=200—80
=120
25×8-80
=200-80
=120
25x8-80=200-80=120
绛旓細鍙互鍒╃敤涔樻硶鍒嗛厤寰嬭繘琛绠渚胯繍绠锛88脳25=锛80+8锛壝25=80脳25+8脳25=2000+200=2200銆
绛旓細瑙e喅鏂规锛25脳锛80x8锛=25脳80.脳8=25x8脳80=200脳80=16000銆傝繖鏄竴涓埄鐢ㄧ埗姣嶄氦鎹㈠拰涔樻硶鐨勫伐鍏凤紝浠ュ強涓涓叧浜庝綘鐨勯棶棰樸
绛旓細25脳88 =锛80脳25锛+锛8脳25锛=10000+200 =10200 姝ら涓轰箻娉曞垎閰嶅緥锛屽彲浠鐢80脳25+8脳25锛岃繖鏍风浉褰撲簬25脳88銆傛帴鐫灏嗕袱鑰呯殑绉畻鍑烘潵鐩稿姞锛屾渶缁堢粨鏋滃緱鍑10200銆
绛旓細绠渚胯绠杩囩▼鏂规硶濡備笅 瑙o細88脳25 =(22脳4)脳25 =22脳(4脳25)=22脳100 =2200
绛旓細88脳25 =8x25x11 =200x11 =2200 浠ヤ笂灏辨槸绠渚鏂规硶銆
绛旓細杩欎釜棰樼洰寰堢畝鍗曞悧鍜88鍙互鎹㈡垚4脳22锛4脳25鐨璇濆氨绛変簬涓鐧句竴鐧句箻浠ヤ簩鍗佷簩灏辩瓑浜2200
绛旓細杩欓亾棰樼敤涔樻硶鍒嗛厤寰嬬畻鍙互绠渚涓鐐广(80-8)x125 =80x125-8x125 =10000-1000 =9000銆
绛旓細鍥炵瓟锛氫箻娉曞垎閰嶅緥涓:涓や釜鏁扮殑鍜屼笌涓涓暟鐩镐箻,鍏堝皢瀹冧滑涓庤繖涓暟鍒嗗埆鐩镐箻,鍐嶇浉鍔,绉笉鍙.鍗:(a+b)脳c=a脳c+b脳c.鍙嶈繃鏉ュ垯:a脳c+b脳c=(a+b)脳c 25 脳88 = 25脳8脳11 = 200脳11 = 2200
绛旓細绛旀锛80
绛旓細25脳88 =25x4x22 =100x22 =2200