题目内容
5.8-5.8×0= | 4- - = | 0.83×50×2= | 4÷ -÷4= |
| 0.5-0.5×0.5= | （ + ）×30= | 8.01+99×8.01= |  × ÷×= |
| 解：5.8-5.8×0=5.8， | 4--=3， | 0.83×50×2=83， | 4÷-÷4=19 ， |
| 0.5-0.5×0.5=0.25， | （+）×30=29， | 8.01+99×8.01=801， | ×÷×= ． |
分析：5.8-5.8×0，0.5-0.5×0.5先算乘法，再算减法；
4-
-根据连续减去两个数，等于减去这两个数的和简算；0.83×50×2运用乘法结合律简算；
4÷
-÷4，同时运算除法，再算减法；（
+）×30，8.01+99×8.01运用乘法分配律简算；×÷×先把除法变成乘法，再运用乘法结合律简算．点评：本题考查了基本的运算，要注意分析数据，选择合适的简算方法计算．
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