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2.015×7.3+20.15×0.37-21.015=几巧算

2.015×7.3+20.15×0.37-2.015 =2.015×7.3+2.015×3.7-2.015 =2.015×(7.3+3.7-1) =2.015×10 =20.15

20.15×7.3+20.15×3.7-20.15 =20.15×(7.3+3.7-1) =20.15×10 =20.15

2.015*7.3+20.15*0.37-2.015的简便运算 2.015*7.3+20.15*0.37-2.015 =2.015*(7.3+3.7-1) =2.015*10 =20.15

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