总述：本次共解1题。其中
           ☆算术计算1题

〖1/1算式〗
    作业：求算式 -90-arctan0.1×3-arctan0.01×3-arctan(1/0.375)*3-arctan(1/84.85)*3+arctan(1/3)*3+arctan(1/10.61)*3 的值.
    题型：数学计算
    解:
          -90-arctan0.1×3-arctan0.01×3-arctan(1/0.375)*3-arctan(1/84.85)*3+arctan(1/3)*3+arctan(1/10.61)*3
        =-90-arctan0.1×3-arctan0.01×3-arctan2.666667*3-arctan(1/84.85)*3+arctan(1/3)*3+arctan(1/10.61)*3
        =-90-arctan0.1×3-arctan0.01×3-arctan2.666667*3-arctan0.011786*3+arctan(1/3)*3+arctan(1/10.61)*3
        =-90-arctan0.1×3-arctan0.01×3-arctan2.666667*3-arctan0.011786*3+arctan0.333333*3+arctan(1/10.61)*3
        =-90-arctan0.1×3-arctan0.01×3-arctan2.666667*3-arctan0.011786*3+arctan0.333333*3+arctan0.094251*3
        =-90-0.099669×3-arctan0.01×3-arctan2.666667*3-arctan0.011786*3+arctan0.333333*3+arctan0.094251*3
        =-90-0.099669×3-0.01×3-arctan2.666667*3-arctan0.011786*3+arctan0.333333*3+arctan0.094251*3
        =-90-0.099669×3-0.01×3-1.212026*3-arctan0.011786*3+arctan0.333333*3+arctan0.094251*3
        =-90-0.099669×3-0.01×3-1.212026*3-0.011785*3+arctan0.333333*3+arctan0.094251*3
        =-90-0.099669×3-0.01×3-1.212026*3-0.011785*3+0.32175*3+arctan0.094251*3
        =-90-0.099669×3-0.01×3-1.212026*3-0.011785*3+0.32175*3+0.093973*3
        =-90-0.299007-0.01×3-1.212026*3-0.011785*3+0.32175*3+0.093973*3
        =-90-0.299007-0.03-1.212026*3-0.011785*3+0.32175*3+0.093973*3
        =-90-0.299007-0.03-3.636078-0.011785*3+0.32175*3+0.093973*3
        =-90-0.299007-0.03-3.636078-0.035355+0.32175*3+0.093973*3
        =-90-0.299007-0.03-3.636078-0.035355+0.96525+0.093973*3
        =-90-0.299007-0.03-3.636078-0.035355+0.96525+0.281919
        =-90.299007-0.03-3.636078-0.035355+0.96525+0.281919
        =-90.329007-3.636078-0.035355+0.96525+0.281919
        =-93.965085-0.035355+0.96525+0.281919
        =-94.00044+0.96525+0.281919
        =-93.03519+0.281919
        =-92.753271
    答案:-90-arctan0.1×3-arctan0.01×3-arctan(1/0.375)*3-arctan(1/84.85)*3+arctan(1/3)*3+arctan(1/10.61)*3=-92.753271
    注：弧度制

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