25÷22的商用循环小数的简便记法表示为________,保留两位小数是________,保留三位小数是________.
1.1


1.14 1.136
分析:先求出25除以22的商,商要计算到小数点后面的第四位;找出循环节,然后再根据四舍五入的方法保留到小数点后面的第二位和第三位.
解答:25÷22=1.13636…=1.1


,
1.1


≈1.14;
1.1


≈1.136;
故答案为:1.1


,1.14,1.136.
点评:此题主要考循环小数的简记法及小数的近似数取值:求一个数的近似值,关键要看清精确到的位数.