北师大版四年级下小数简便运算练习题(共1页).doc

四年下：小数简便运算18.957.98 36.5728.4663.43 37.234.825.18 5.592.822.18 4.523.461.48+0.54 4.67（2.98+0.67）0.841.252.5 8.881.25 9.99.999 5.761015.76 6.43.28+4.63.28-3.28 1310.2（40+0.4）2.5 3.95999 4.183.84.185.24.18 12.79.91.27 2.75827.50.2 1.257.312.50.27 3.140.6831.40.032 4.87.8780.52 31