1、四年级数学下册简便计算专项练习题17301969630125(84)505049301262631416941869925(32+4)5591001559859851625871656587125(82)9494197014444432657267999925(24+4)493100149349999498025141141414125(86)89894990115158389238909925(12+4)393101393359357225911404091125(86)707029701353561303930989925(16+4)2051120563963812586193938612
2、5(82)212179101484877693764599925(4+4)455114559599958025971969697125(810)3333295015757529848988899925(28+4)39510013954799474825341959534125(86)7373497013939463554359310125(32+4)1361001136309303225851606085125(84)4949497016767472253224610125(32+4)40911409579995756125421424242125(86)8181699014343129388
3、9380100125(16+4)368100136869996916125131373713125(810)58589101121254534653809925(32+4)3441001344199991916125651373765125(84)4646697018989774423442010125(4+4)364100136496996825601161660125(82)6262597017777378463847910125(32+4)3781001378929999280125641585864125(88)909029901767610659065649925(20+4)2031
4、120316991664125441616144125(88)606069100125259474674479925(8+4)377100137737993724125241909024125(88)5353191012727323968394699925(24+4)28410128423992332125261121226125(82)8989794016161685032505599925(16+4)249101249479474825841515184125(84)626229301595943225722899925(28+4)18911189699691625281848428125(810)5757199013232764724477099925(32+4)1371011374094056125241383824125(84)888899201242491579572499925(40+4)53610153612999127225381949438125(84)5353394018989754825485699925(12+4)17110011719599556125