5□3÷58,要使商是一位數(shù),□里最大填________;要使商是兩位數(shù),□里可以填________.
7 8、9
分析:根據(jù)題意,要使商是一位數(shù),那么被除數(shù)的前兩位數(shù)要小于除數(shù)58;要使商是兩位數(shù),被除數(shù)的前兩位數(shù)要大于或等于除數(shù)58;然后再進一步解答即可.
解答:根據(jù)題意可得:
5□3÷58,要使商是一位數(shù),被除數(shù)的前兩位數(shù)要小于除數(shù)58,即5□<58;
那么,□里可以填:0,1,2,3,4,5,6,7;
所以,□里最大填7;
5□3÷58,要使商是兩位數(shù),被除數(shù)的前兩位數(shù)要大于或等于除數(shù)58,即5□≥58;
那么,□里可以填:8、9.
故答案為:7,8、9.
點評:除數(shù)是兩位數(shù),被除數(shù)是三位數(shù)的除法,商的位數(shù)要看被除數(shù)的前兩位數(shù)與除數(shù)的大小,被除數(shù)的前兩位數(shù)小于除數(shù),商就是一位數(shù),被除數(shù)的前兩位數(shù)大于或等于除數(shù),商就是兩位數(shù).