Question

16．$\frac{1}{2}$×$\frac{1}{5}$÷$\frac{1}{2}$×$\frac{1}{5}$=$\frac{1}{25}$．

Answer 1

分析 把除法先变成乘法，再根据乘法的交换律简算．

解答 解：$\frac{1}{2}$×$\frac{1}{5}$÷$\frac{1}{2}$×$\frac{1}{5}$
=$\frac{1}{2}$×$\frac{1}{5}$×2×$\frac{1}{5}$
=$\frac{1}{2}$×2×$\frac{1}{5}$×$\frac{1}{5}$
=$\frac{1}{5}$×$\frac{1}{5}$
=$\frac{1}{25}$
故答案为：$\frac{1}{25}$．

点评 此题重点考查了学生对运算定律的掌握与运用情况，要结合数据的特征，灵活选择简算方法．