1、四年级数学下册简便计算专项练习题214251595925125(84)59596990164645084508458100125(32+4)4861001486269992640125781636378125(810)5454296012020633637365199925(32+4)46411464429994248125861898986125(88)818199301515122797879329925(16+4)3391001339769997648125281181828125(82)36364960157577113291361100125(28+4)472101472749997
2、440125551404055125(82)17177980118186772337248100125(20+4)206112063993948125871777787125(84)545499301737334356635639925(32+4)204112041591572125531949453125(82)83835940139395770437018100125(20+4)240101240959954025871373787125(82)373799100154541564856497100125(32+4)219112192692656125671262667125(82)919
3、1694017979235377532399925(8+4)3611136150995056125821454582125(810)888869100114144416561623100125(32+4)2541012544699463225701262670125(88)212119201151575112511839925(4+4)511115115595564125111595911125(84)8888595016262832117218010125(20+4)370100137075999754825211848421125(84)56565970143437058305881999
4、25(28+4)5621015625595532125601848460125(810)868689401585886421442289925(24+4)508101508209992016125651343465125(810)17173940166668922112246100125(36+4)45910145996999962425441212144125(82)4141693012424523748372599925(4+4)2261122684999844825871787887125(84)2525980136361430863067100125(28+4)1751117525992556125221212122125(88)3232392015252306670669310125(20+4)42510142531999318025311666631125(84)505069701898978692269319925(20+4)3351013355999594025221959522125(86)8484393013636231277126699925(16+4)26811268359354825
