题目

4.05×1.7的积是   位小数，保留两位小数是    ， 精确到个位是    ． 答案：【答案】三；6.89；7【解析】解：4.05×1.7=6.885 6.885是三位小数；6.885≈6.896.885≈7答：4.05×1.7的积是三位小数，保留两位小数是6.89，精确到个位是7．故答案为：三，6.89，7．根据小数乘法的计算方法，先求出4.05×1.7的积，然后再根据四舍五入法求出近似数．Dung is kind and helpful, but he is also a little careless _____________. A. at time                    B. at a time                  C. at times                   D. once a time