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2.5÷11=
0.2
?
2
?
7
0.2
?
2
?
7
,保留两位小数是
0.23
0.23
分析:根据小数除法的计算方法,求出2.5÷11的商,然后再根据四舍五入法保留两位小数.
解答:解:
2.5÷11=0.2
?
2
?
7

0.2
?
2
?
7
≈0.23.
答:2.5÷11=0.2
?
2
?
7
,保留两位小数是0.23.
故答案为:0.2
?
2
?
7
,0.23.
点评:关键是求出商,用循环小数表示出来,然后再根据四舍五入法保留两位小数.
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3×1.5=2.5×4=0÷0.9=4÷0.2=
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