Mathematics
         
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Mathematical calculation:
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    Overview: 1 questions will be solved this time.Among them
           ☆1 arithmetic calculations

[1/1 Formula]
    Work: Calculate the value of equation (20+19.4×1.7+19.2×3.1+19.8×3+20×2.5)×0.52-2×40×0.72 .
    Question type: Mathematical calculation
    Solution:
          (20+19.4×1.7+19.2×3.1+19.8×3+20×2.5)×0.52-2×40×0.72
        =221.9×0.52-2×40×0.72
        =115.388-2×40×0.72
        =115.388-80×0.72
        =115.388-57.6
        =57.788

    Answer:(20+19.4×1.7+19.2×3.1+19.8×3+20×2.5)×0.52-2×40×0.72=57.788


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