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8.4÷0.6x3.9怎么脱式计算

8.4÷0.6x3.9 =14×3.9 =54.6

0.309×3.9÷2.6 =0.309×(3.9÷2.6) =0.309×1.5 =0.4635

5.52x3.12x0.6 +8.9 =17.2224×0.6+8.9 =10.33344+8.9 =19.23344

8.2-9.6x0.5 =8.2-4.8 =3.4

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