乐易奥数五年级第一讲：简便计算1. 44425 2. 11111999993. 2006+200.6+20.06+2.006+994+99.4+9.94+0.9944.（4+5+6+7+8+9+10+11+12+13+14）95.416480+4160526.0.2+0.4+0.6+0.10+0.12+0.98+0.1007.200920092008-2008200820098.（12345+23451+34512+45123+51234）5乐易奥数五年级9.0.9+0.99+0.999+0.9999+0.9999810.9+99+999+9999+99992003 个 911.2003-20022001-20001999-1998-4 3-2 1 199719979971997971997719971997997977作业：623438203814（235711131719）（38516577）1-35-79-11-19992001乐易奥数五年级777611158（247472724）9
