题目内容
| 7.2+2.8= | 12×2.5= | 2.63+0.37= | 4.8÷0.3= |
| 0.96÷0.3= | 1.5-4.5= | 2.5×0.4= | 1.4×2.5×4= |
| 8-2.5= | 6÷1.2= | 9.2÷2.3= | 24÷4+56÷4= |
| 0.36+0.64= | 4÷0.25= | 1.8×5= | 30×（200+3）= |
| 8.4÷4.2= | 8×1.5= | 0.7×16-16×0.2= | 2.73+1.5×4= |
分析：本题根据小数加法，减法，乘法与除法的运算法则计算即可．1.4×2.5×4应用乘法结合律，24÷4+56÷4应用乘法分配律化成（24+56）÷4，30×（200+3）应用乘法分配律展开，0.7×16-16×0.2应用乘法分配律，简便计算．
解答：解：
| 7.2+2.8=10 | 12×2.5=30 | 2.63+0.37=3 | 4.8÷0.3=16 |
| 0.96÷0.3=3.2 | 1.5-4.5=-3 | 2.5×0.4=1 | 1.4×2.5×4=14 |
| 8-2.5=5.5 | 6÷1.2=5 | 9.2÷2.3=4 | 24÷4+56÷4=20 |
| 0.36+0.64=1 | 4÷0.25=16 | 1.8×5=9 | 30×（200+3）=6090 |
| 8.4÷4.2=2 | 8×1.5=12 | 0.7×16-16×0.2=8 | 2.73+1.5×4=8.73． |
点评：完成小数加减法题目时，要注意小数点的对齐；完成小数乘除法题目时要注意小数点位置的变化．
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