2.1-2.09=0.01,0.01×45=0.45,0.045÷0.45=0.1列成综合算式

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2.1-2.09=0.01,0.01×45=0.45,0.045÷0.45=0.1列成综合算式
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2.1-2.09=0.01,0.01×45=0.45,0.045÷0.45=0.1列成综合算式
2.1-2.09=0.01,0.01×45=0.45,0.045÷0.45=0.1列成综合算式

2.1-2.09=0.01,0.01×45=0.45,0.045÷0.45=0.1列成综合算式
(2.1-2.09)×45÷0.45
=0.01×45÷0.45
=0.045÷0.45
=0.1