三年级数学第二学期“神算子”计算比赛班别: 姓名: 成绩: 一、直接写出得数:(共 20 分)30030 = 2410 = 12200 = 2220 =1820 = (50+25)2= 396 = 14020=223= 099+1= 10001= 500+800= 1059= 6070 = 245155= 1311=510203= 8044= 3903= 25005=47+253= 101+89= 50025= 617=7217= 800425= 2342= 81009=228+45 = 1482 = 24+180 = 5110 =99+0= 100-00= 60-500= 0(027)=43 = 61100= 425= 8125=二、估算下面各题: (共 12 分)1243 2234 1926 19224031 7239 5708 9844851 9278 5699 2435三、列竖式计算。(要求验算的题目要验算,共 68 分)1095-796 = 489+521= 6804= 5964 = 8946 = 4536 =4387 = 8324 = 4267 = 8845 = 2618 = 2626 =5175= 6804= 7579=3928 = 9245 = 验算: 验算: