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           ☆1 arithmetic calculations

[1/1 Formula]
    Work: Calculate the value of equation (18/5-2)*(18/5-6)/(-21/5+3)*(-21/5+1) .
    Question type: Mathematical calculation
    Solution:
          (18/5-2)*(18/5-6)/(-21/5+3)*(-21/5+1)
        =1.6*(18/5-6)/(-21/5+3)*(-21/5+1)
        =1.6*(-2.4)/(-21/5+3)*(-21/5+1)
        =1.6*(-2.4)/(-1.2)*(-21/5+1)
        =1.6*(-2.4)/(-1.2)*(-3.2)
        =-3.84/(-1.2)*(-3.2)
        =3.2*(-3.2)
        =(-10.24)

    Answer:(18/5-2)*(18/5-6)/(-21/5+3)*(-21/5+1)=-10.24


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