计算题专项训练(答 卷 时 间:10 分 钟 完 成,总分:100分)姓名: 成绩: 一、口算。(40分)0.246.9 = 9.17.3 = 1.26 = 7.22.8=313 = 245 = 10008 = 0.80.6 =1.254 = 30050 = 4800.6 = 0.159=3.40.7= 2.23 = 0.21.1 = 2.10.3=二、下面各题,各样简便就怎样算。(60分)2.15+8.73+1.27+7.85 11.87-(8.2+1.87) 5.42-3.87-1.13 4.381.56+0.620.44 0.42702.5 (40+1.25)8 (12.50.05)8 2.68.5+8.57.4 9.96.96.93.9 5.699+5.6 2.5(1.91.91.91.9) 7.21.258