七年级下数学堂堂练附赠试卷试卷2答案 求七年级下册数学堂堂练一道解答题答案/////
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绛旓細1瑙ｏ細鍘熷紡=[(a-c)-b][(a-c)+b]-[(-a+b)-c][(-a+b)+c]=[(a-c)²-b²]-[(-a+b)²-c²]=(a-c)²-b²-(-a+b)²+c²=[(a-c)²-(a-b)²]-(b²-c²)=(a-c+a-b)(a-c-a+b)-(b+c)(b-...
绛旓細鐭ラ亾浠涔堜粈涔堝湴鍖鸿冭瘯棰樼洰銆佷粈涔堜粈涔堜功绗嚑椤点佹煇鏌愪汉濂ユ暟棰樼洰绗嚑椤点佷粈涔堜粈涔堝湴鍖哄悕鏍¤棰樿蒋浣撶瓑绛夛紝鍑洪鍓嶆兂鎯冲埆浜烘庝箞甯紝闄や簡鍑鸿剳瀛愬府浣犳兂棰樼洰锛岄毦閬撹繕瑕佽姳閽变拱涔︽潵甯綘绛旈锛熶笂涓収鐗囨垨鍥剧墖涓嶄細锛熸垨鑰呴棶棰樺嚭娓呮鐐逛笉琛岋紵濂借鍫傚爞缁冧竷骞寸骇涓婂唽鏁板绛旀29椤 1涔(x+1)=1鎵浠1/(x+1)-1=11/(x...
绛旓細浣滀笟鍢涗綔涓氾紝鏃㈢劧鏄綔涓 灏辫鐢ㄥ績鍘诲畬鎴 濡傛灉缁欎綘绛旀鐨勮瘽 瀵逛綘鏄笉璐熻矗浠荤殑琛ㄧ幇銆傚厛闂悓瀛︼紝鍐嶉棶鑰佸笀锛屼竴姝ヤ竴姝ユ潵銆
绛旓細涓婃捣鏂版暀鏉愮増涓冨勾绾涓鏁板鍫傚爞缁绗節绔犳暣寮9.12瀹屽叏骞虫柟鍏紡绗竴澶ч濉┖棰,鍦ㄧ嚎绛,鎬!!! 鎴戞潵绛 浣犵殑鍥炵瓟琚噰绾冲悗灏嗚幏寰: 绯荤粺濂栧姳15(璐㈠瘜鍊+鎴愰暱鍊)+闅鹃濂栧姳20(璐㈠瘜鍊+鎴愰暱鍊)1涓洖绛 #鐑# 璇ヤ笉璇ヨ瀛╁瓙寰堟棭瀛︿範浜烘儏涓栨晠?鍖垮悕鐢ㄦ埛 2015-10-13 灞曞紑鍏ㄩ儴 宸茶禐杩 宸茶俯杩< 浣犲杩欎釜鍥炵瓟鐨勮瘎浠...
绛旓細2鐨6娆℃柟x鐨3娆℃柟=锛4x 锛夌殑3娆℃柟
绛旓細濂借鍫傚爞缁鍖楀笀鏁板浜斾笅缃戜笂鏈夊崠鐨勩傚彲浠ュ幓浜笢銆佹窐瀹濄佹嫾澶氬绛夎喘鐗〢PP鐪嬩竴涓嬶紝涓鑸繖浜涜鏈綉涓婇兘鏈夊崠鐨勩
绛旓細鎴戞湁涓鏈紝7骞寸骇鐨勶紝鏄鏍″彂鐨勶紝鑳戒拱鍒板惂...
绛旓細鎬ョ敤 5 2013-01-01 涓冨勾绾т笂涓鏁板鍙屽熀杩囧叧鍫傚爞缁10.6(2)绛旀 5 2011-03-05 涓冨勾绾т笅涓鏁板鍙屽熀杩囧叧鍫傚爞缁冪瓟妗 100 2013-04-06 姹傜瓟妗(2012-2013瀛﹀勾搴 涓鏁板鍙屽熀杩囧叧 鍫傚爞缁 ... 2019-12-18 鏁板鍙屽熀杩囧叧鍫傚爞缁2019-2020鍏勾绾х涓瀛︽湡绗64椤垫媿......
绛旓細1.锛1+4+6+7锛変簩娆℃柟=18浜屾鏂 锛2+3+5+8锛変簩娆℃柟=18浜屾鏂 鈭1鐨勪簩娆℃柟锕㈠洓鐨勪簩娆℃柟锕㈠叚鐨勪簩娆℃柟锕竷鐨勪簩娆℃柟锛濅簩鐨勪簩娆℃柟锕笁鐨勪簩娆℃柟锕簲鐨勪簩娆℃柟鍏殑浜屾鏂 2.锛2+5+7+8锛変簩娆℃柟=22浜屾鏂 锛3+4+6+9锛変簩娆℃柟=22浜屾鏂 鈭翠簩鐨勪簩娆℃柟锕簲鐨勪簩娆℃柟锕竷鐨勪簩娆...
绛旓細瑙ｏ細璁惧師璁″垝姣忓ぉ鐑х叅x鍚紝鍒欑幇鍦ㄦ瘡澶╃儳鐓-20鍚 50/x=50/锛坸-2锛-20 鍖栫畝鏂圭▼寰 x²-2x-5=0 瑙ｅ緱 x=1-鏍瑰彿6 璐熸暟锛岃垗鍘伙紝x=1+鏍瑰彿6
