时间：20分钟
一、口算（38×1′）
| 3.24×0.2= | 4×0.12= | 1.23×0.3= | 0.8×0.3= |
| 0.226÷2= | 432÷100= | 13.58＋0.04= | 60×0.13= |
| 99×0.01= | 0.33×2= | 0.96×0.2= | 1.5×0.02= |
| 1.72×0.5= | 0.6÷0.04= | 5.6＋9.37= | 60-15.9= |
| 2.2＋0.88= | 3.42÷0.3= | 1.5÷0.6= | 35.5÷0.5= |
| 0.01×0.1= | 0.63÷0.9= | 78.3÷3= | 7.07÷0.7= |
| 720×0.09= | 8.72÷0.8= | 86.4÷0.4= | 9.9÷9= |
| 2.4×0.08= | 0.76×0.5= | 1.3×0.06= | 450×0.01= |
| 32.5-8.6= | 1.8÷0.3= | 1.375＋0.07= | 24.4÷4= |
| 16.88-7.59= | 0.75＋10.3= |
109×0.04-9×0.04 4.7×11-4.7 0.75×18÷0.15
72÷0.8÷0.9 1.25×3.2×2.5 4.5×0.8÷0.8×4.5
三、竖式计算（带★要验算）（8×4′，验算2×2′，估算2×1′）
★3.256×0.5= 241.36÷5.6=
3.43×0.41 1.36÷3.5
（得数保留一位小数） （得数保留两位小数）
2.08÷1.8= 10.2×0.067=
（商用循环小数表示）
★0.57×2.1= 5.76÷0.4=
