小数加减法练习题(一)一、口算。3.2+1.8= 0.9+0.6= 0.10.01= 1.20.12=10.385= 3.22.3= 0.760.38= 157.352.65=2.1+0.2= 0.3+0.7= 3.6+1.6= 7.5-0.5= 3.7-0.9=2.13-0.02= 3.51+0.2= 102+0.3= 1.12-1.02= 4.5-0.01=二、火眼金睛辩对错,并且改正。(1)12.451.350.65 (2)21.32(6.32+8.3)=21.326.32+8.3 =12.45(1.35+0.65) =15+8.3 =12.452=23.3 ( ) =10.45 ( )三、用简便方法计算。(1)27.3+73.2+72.7 (2) 585+189+215 (3) 5.851.750.25 (4)768274126 (5) 5.85+1.89+2.15 (6)24.8+14.6+15.4(7)42.522.177.83 (8)3.8+1.37+6.2+12.63