78×(82+28)巧算怎么算
方法如下。78×(82+28)
=78×82+78×28
=6396+2184
=8580
巧算方法就是通常所说的简便运算。运用加、减、乘、除法的一些性质和运算律，使复杂的计算简单化，达到提高运算速度和正确率的目的。
绛旓細鎵浠ヨ澶у鍗冧竾涓嶈鎶宸х畻鍜岀湡姝ｇ殑閫熺畻娣锋穯鍦ㄤ竴璧,鐪熸鐨勯熺畻鏄换浣曟暟閮借兘绠楃殑銆傚叚銆佸叧浜9鐨勬暟瀛﹂熺畻鎶宸(涓や綅鏁颁箻娉)鍏充簬9鐨勫彛璇:1脳 9 = 9 2 脳 9 = 18 3 脳 9 = 27 4 脳 9 = 365脳 9 = 45 6 脳 9 = 54 7 脳 9 = 63 8 脳 9 = 729脳 9 = 81浠庝笂闈㈢殑鍙ｈ瘈鍙ｆ湁娌℃湁鐪嬪埌浠1鍒...
绛旓細=锛80+2锛壝楋紙90-4锛=80脳90-80脳4+90脳2-2脳4 =7200-320+180-8 =7208-140 =7068
绛旓細骞冲潎鏁颁负80锛屽洜鑰屾柟宸=[(83-80)^2+(82-80)^2+(81-80)^2+(79-80)^2+(78-80)^2+(77-80)^2]梅6 =(9+4+1+1+4+9)梅6 =28梅6=14/3 鏍囧噯宸槸鏂瑰樊鐨勭畻鏈钩鏂规牴 鈭磋繖缁勬暟鐨勬爣鍑嗗樊鏄皢14/3寮绠楁湳骞虫柟鏍癸紝绾︿负2.16 渚嬪锛氬钩鍧囨暟鏄80 涓庡钩鍧囨暟鐨勫樊鏄 3锛2锛1锛-1锛-2锛...
绛旓細342锛420梅60 =342-7 =335 245锛255梅30 =245+8.5 =253.5 218锛178锛82 =218锛82锛178 =300-178 =122 5脳182锛18脳5 =5脳锛182+18锛=5脳200 =1000 82脳锕351锛104锕=82脳455 =37310 锕522锛477锕毭140 =45脳140 =6300 9090梅15脳20 =9090脳20梅15 =181800梅15 =12120 63...
绛旓細1.閫熺畻涔嬪噾鏁村厛绠椼傘愮偣鎷ㄣ戯細鍔犳硶銆佸噺娉曠殑绠渚璁＄畻涓紝鍩烘湰鎬濊矾鏄滃噾鏁粹濓紝鏍规嵁鍔犳硶锛堜箻娉曪級鐨勪氦鎹㈠緥銆佺粨鍚堝緥浠ュ強鍑忔硶鐨勬ц川锛屽叾涓嫢鏈夎兘澶熷噾鏁寸殑锛屽彲浠ュ彉鏇寸畻寮忥紝浣胯兘鍑戞暣鐨勬暟缁撴垚涓瀵瑰ソ鏈嬪弸锛岃繘琛屽噾鏁磋绠楋紝鑳戒娇璁＄畻绠渚裤備緥锛298+304+196+502 銆愬垎鏋愩戯細鏈鍙互杩愮敤鍔犳硶浜ゆ崲寰嬪拰缁撳悎寰嬶紝鎶...
绛旓細宸х畻锛76+77+78+80+81+83+85 =70x3+6+7+8+80x4+1+3+5 =210+320+21+9 =530+30 =560
绛旓細瑙ｏ細鍘熷紡=82脳(73+28-1)=28脳100 =2800 濡傛灉浣犺鍙垜鐨勫洖绛旓紝璇峰強鏃堕噰绾筹紒涓嶆噦鍙拷闂紝閲囩撼鏄姣忎竴涓洖绛旇呮渶鐪熸寶鐨勬劅璋紝璋㈣阿鍚堜綔锛佸笇鏈涘浣犳湁甯姪
绛旓細28脳82=2296銆
绛旓細鎮ㄥソ锛屽瘨妯辨殩鏆栦负浣犺В绛旓細鍘熷紡 =28脳锛82+15锛+97脳72 =28脳97+97脳72 =97脳锛28+72锛=97脳100 =9700 濡傛灉浣犺鍙垜鐨勫洖绛旓紝璇峰強鏃剁偣鍑汇愰噰绾充负婊℃剰鍥炵瓟銆戞寜閽紝锛堟垨鍦ㄥ鎴风鍙充笂瑙掕瘎浠风偣銆愭弧鎰忋戯級浣犵殑閲囩撼锛屾槸鎴戝墠杩涚殑鍔ㄥ姏! 浣犵殑閲囩撼涔熶細缁欎綘甯﹀幓璐㈠瘜鍊肩殑銆傚鏈変笉鏄庣櫧锛屽彲浠ヨ拷闂紝鐩村埌...
绛旓細18X82+28X81 =20X82-2X82+30X81-2X81 =1640+2430-2X(82+81)=4070-2X163 =4070-326 =3744
