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二点五乘四十点一怎样用脱式计算

=40×2.5×8.2 =100×8.2 =820

11.4+1.25×2.4 =11.4+1.25×8×0.3 =11.4+10×0.3 =11.4+3 =14.4

3.5x13-0.46 =45.5-0.46 =45.04

11.4+1.25×2.4 =11.4×1.25×8×0.3 =11.4+3 =14.4

3.2805

14.6×0.28×12.5 =4.088*12.5 =51.1

10.64+7.56×2.4+11.76 =10.64+18.144+11.76 =28.784+11.76 =40.544

360÷[(12+6)×5] 288÷[(26-14)×8] 500×6-(50×2-80) (105×12-635)÷25 864÷[(27-23)×12] (45+38-16)×24 500-(240+38×6) [64-(87-42)] ×15 (845-15×3)÷1612×[(49-28)÷7] 450÷[(84-48] )÷12 (58+37)÷(64-9×5) 9...

4.2÷14=0.3

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