1、840 52023? 70444 48032672 75458?89739? 62457618?173 11736?91 13615?52315? 57 3621535126 23512?32119?16?332215?6? 16525631?306 260 30346?6522416748?45? 78050520 920 84070444? 4802175462426 ?9.990.0?284035?630961191 ?98028 ?828234 613 320257210+2865? 44476? 4321 350 930 864694598126 60987 9100240?5070
2、39 793645028932000700?5?1088312?7210? 1389?82403?1268920331233685891827?88837?64543728?117 9165 13615 ?5715829444加法交换结合律:4825175 ?5781432257?1288972? 357288143129235171165?37852773?16728933?583942617534125366?12575320?15338162?16332137268?158395105?82219778?8.?商不变规律:300400024060032004001508002000900
3、0125混合运算?6726727? 987(345298) 210520(240227)3402402030(320170)90?458(8528)23630840(240212) ?408512(178283)?864(2723)12(10512635)24014053?36026010448272163565520?2401802 ?3020146(3442070)(2714)4?(77217)691?(165655)5 ?(120195)15557(18626)375(2510)(65934)+(28040)1527-2008?(324-285)26 (1604812)4?(3629)6
4、?62(3001455)?50 (3654984)90(6752)?18236(126)? 640(96-80)1256084864012 2800100789?(947599)7664(91327623)?(932521) 5071363498723(521504)3841223371?(3921)(3966)156(17.7-7.2)3?37.85-(7.85+6.4)? 28(5+969.9318)81(72-54)9 ?(15003245) ?192(5438)67?13825(13125)(38)?(12+24+80)70432(25+125) ?178101178?8436+648
5、47599+275?83102832 98199? 1231812?33+85123?50(344)(24+16)?99+178?7942+79+7957?7300258100427+19870+13310 ?4(2565+2528)?1025898?28084085(95144024)? 58870(105202)80400(430087015)?14372727563? 814325278) (331)? 37.4(8.67.246.6)?107-7729?37.85-(7.85+6.4)2875+96990318? 1554(72-58)(126)5?288(2614)8?5006-(5
6、02-80)?6412? (453816) 500(240386)?64(8742)?(845153)(4928)7(8448?)58+37)(64-9178-1456+42口算题?38019=?40100=?202020=?75-755=?40+36090=8=?7720 ?100-136=?66060=?7030=?3420=50=?350+80=?40=?2845=? 300523=42021=?460280? 145+8=?45-27=?12+1212=?09=6-70? 280+70=?81027? 45059=? 60 1000760100 1225? 623? 065+5? 6+
7、18+84?98+12?4215?99?6090=?34=432=?11600=?75-18=? 70-30=? 8000-3000=?120900= ? 9003=? 3204=?4? 84431.4 13100? 1206?8558?4.31000=?2.50.05?4520?1002.8?98?891=? 10(2.3+2.7)?997=?0.5+1.5=?62=(3625)=?0.750.3=? 0.5+0.5=? 0.5-0.5=?3008416=0.691.1=?18= ?7724030? 1.30.8=?60.37=?0100+100=?0=? 2.730.27=?540270?
8、 40050=9933=? 18470+70=?14140070=?6120=?480620-30=?217-65-35=?30-306+8=计算下面各题,能简便要简算?49102249?788.332.434.57?99376.7-2.633.3-3.37 ?41000(415) 3.572+6.55824(8578)2870 6.450.581.42? 3.276.42.734.6?12000825 (160+880)(324285)36 996464?715+265+335+285?462017100-137-263+300?2 3434666 ?74(16726)37-56+73-44
9、 ? 45108? 248302?675 5522785546-346=?78?9999?98101?101999+49 ?4545264573?383636874(2423506)(159)?(15530)2599?(696456)48(3959433)?(40+4)25=? 12543574357=?524576203=?289104=? 9610196=486(18659)41=?863297= 216305=?32=?4723664=402359=?4378122257=?(264)=?44= ?354(22946)=简便计算分类练习题?第一种?(300+6)x12?25x(4+8)?
10、125x(35+8)?50 32(25+125)(24+16) ? (13+24)x8?第二种 84x101?504x25?78x102?25x204 ?88 10210187?第三种?99x64 ?99x16?638x99?999x99? 98x27?x34?第四种?99X13+13?25+199X25?32X16+14X32?99+178 84?2?310?78X4+78X3+78X3第五种?88X125?72X125?125X32X8?25X32X125?第六种?3600300012512503900(3925)?(57)?(20第七种1200-624-76?2100-728-772?2
11、73-73-27?847-527-273?50012471021232?2356(1356721)?1235(17801665)?30657381065?2357183317357?23651086214?第八种278+463+22+37?732+580+268?425+14+186?158+262+138?1034+780320+102?375+219+381+225?2214+638+286?181+2564)+2719?378+44+114+242+222?276+228+353+219?(375+1034)+(966+125)?(2130+783+270)+1017?99+999+99
12、99+99999?第九种214-(86+14) ?787-(87-29)?365-(65+118)?455-(155+230)第十种?576-285+85?825-657+57?690-177+77?755-287+87第十一种?871-299?157-99?363-199?968-599?1883398?497299?899+344?3999+498?2370+1995?157+99?第十二种178X101-178?83X102-83X2?17X23-23X7?35X127-35X16-11X35?12318123容易出错类型(共五种类型)?600-6020X420X4?736-35X20?
13、25X425X4?98-18X5+25?56X856X8 ?280-8012X612X6?175-7525X825X8?80-20X2+60?36X936X9? 36-366-6(25X8)?100+45-100+45? 15X97+3 100+1-100+1?48X99+11000+8-1000+8?5+95X28?102+1-102+1?65+35X13?25+75-25+75?20-10?13+24X8?672-36+64?324-68+32?100-36+64?简便计算综合练习题1?2639613569565555?10178?76477676?1345613445134?244823
14、(404) 9999991999?18498 695202 864199738301? 380476120?(569468)(432131)?25614753?37312929?189(8974)?72简便计算练习题2?1642?456(25636)?(181+2564)+2719?(375+1034)+(966+125) 99+999+9999+99999?7755(2187+755)7755(2187+755)?简便计算练习题3?8)(25+125)?12357简便计算练习题4?1248315048002150016800120?301002100400?49700 375+219+381
15、+225? 50012471021232 378+44+114+242+222?(375+1034)+(966+125) (2130+783+270)+1017? 2214+638+286?简便计算练习题5?76 589899+178 7300 810075 ?简便计算练习题6?(ab)?c?=?a?(bc)?2.73?0.89?1.27?4.37?0.28?1.63?5.72?abc?(bc)?10?0.432?2.568?9.3?5.26?2.74?14.9(5.24.9)?18.32?5.47?4.32?(a?b)(b?c)?6.8?0.04?0.25?0.125?6.4?1.25?12.5?(a+b)=?cb?0.45?201?0.58?10.1?50.2?4.7?9.9?简便计算练习题7?3.28?5.7?6.72?2.1?0.1?2.3?0.18?4.26?0.18?1.3?7.3?2.7?3.75?0.5?2.75?6.3?1.8?9.5?(1.9?12.8?(0.4?1.6)930?0.6?63.4?2.5?0.4?(7.7?1.54)0.7?简便计算
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