001new 0—100 整数加减乘除四则运算，如结果为小数四舍五入保留小数点后两位。根据输入题数

Title: 001new

Description: 0—100 整数加减乘除四则运算，如结果为小数四舍五入保留小数点后两位。根据输入题数出题，题目应为随机，每次应不一样。

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