五年级数学小数乘除法综合复习教程

一、列竖式计算1.9x2.8 12.6x1.17（保留两位小数）0.89x5.6（验算）1.28x0.07（保留三位小数）220.55=5.586.2=9.521.2=78.611=二、简便运算2.5x3.8x0.4x0.26.5x1.9-6.5x0.92.58x9+2.582.7x10.29.8x259.7x1024.8x56.7+0.567x20+5.67x50 6.40.16 4.80.50.8 1.60.25简算简算 6.40.16 4.80.50.8 1.60.250.450.60.5 9.814 5.63.5 3.64.80.8 70.125 0.121.25 （360.24）0.12 7.83.43.9 2.55040 4.26.51.3 4.6(0.42.3)5.584.50.125 3.50.25 5.2343.230.25(6.43.2)8 (31.611.7)2.50.4=6416=6482=82=4=4.8（0.50.8）=4.80.4=484=12=（1.64）（0.254）=6.41=6.4