题文
2.5+3.7= 217÷7= 70﹣34=
1.2×0.5= 1.3+27= 1.5÷0.5=
4.5﹣0.5= 25×0.4= 
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2.5+3.7= 217÷7= 70﹣34=
1.2×0.5= 1.3+27= 1.5÷0.5=
4.5﹣0.5= 25×0.4= == = == = ==
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