1、四年级数学下册简便计算专项练习题90581969658125(88)65656920131312813721323100125(28+4)409114096599965825221242422125(88)191939100116164868526896100125(36+4)2821128237993756125811494981125(84)38388960142424328572882100125(4+4)4651014659699961625471111147125(88)22225910127272315771589100125(12+4)5301153077977162512162
2、6212125(84)555589701222266373437869925(16+4)303100130328999283225251555525125(810)30308980181819373773779925(40+4)55511555869998680125121858512125(84)3737197012020293471343710125(20+4)292101292499491625561636356125(810)131319301707057714371119925(24+4)37110013716696616125931141493125(86)929299701959
3、5545546554810125(32+4)396101396149914825551979755125(810)38385940119192484768491100125(20+4)45110014511391324125501555550125(82)5252970176762145794591100125(28+4)591101591799997964125371787837125(84)11118950141418279187968100125(40+4)16410011641791740125811717181125(82)222229401141499601603710125(8+
4、4)4001140077997740125211303021125(86)202089100132325783438348100125(36+4)4331001433269267225951363695125(86)27271940121212621742174100125(40+4)302113029399938125791777779125(82)4545395015858934974990100125(24+4)4791014797699976825861686886125(84)6262297016161346266624799925(8+4)46710014674699464825521202052125(82)7979497014242713931356100125(40+4)376100137679997932125221707022125(82)39391910013030376463648210125(28+4)21910121916991664125791474779125(82)76769701707098432438599925(12+4)1441011447599754025