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-arctan0.1×70-arctan0.01×70-arctan(1/0.375)*70-arctan(1/84.85)*70+arctan(1/3)*70+arctan(1/10.61)*70 的值.
    题型：数学计算
    解:
          -90-arctan0.1×70-arctan0.01×70-arctan(1/0.375)*70-arctan(1/84.85)*70+arctan(1/3)*70+arctan(1/10.61)*70
        =-90-arctan0.1×70-arctan0.01×70-arctan2.666667*70-arctan(1/84.85)*70+arctan(1/3)*70+arctan(1/10.61)*70
        =-90-arctan0.1×70-arctan0.01×70-arctan2.666667*70-arctan0.011786*70+arctan(1/3)*70+arctan(1/10.61)*70
        =-90-arctan0.1×70-arctan0.01×70-arctan2.666667*70-arctan0.011786*70+arctan0.333333*70+arctan(1/10.61)*70
        =-90-arctan0.1×70-arctan0.01×70-arctan2.666667*70-arctan0.011786*70+arctan0.333333*70+arctan0.094251*70
        =-90-0.099669×70-arctan0.01×70-arctan2.666667*70-arctan0.011786*70+arctan0.333333*70+arctan0.094251*70
        =-90-0.099669×70-0.01×70-arctan2.666667*70-arctan0.011786*70+arctan0.333333*70+arctan0.094251*70
        =-90-0.099669×70-0.01×70-1.212026*70-arctan0.011786*70+arctan0.333333*70+arctan0.094251*70
        =-90-0.099669×70-0.01×70-1.212026*70-0.011785*70+arctan0.333333*70+arctan0.094251*70
        =-90-0.099669×70-0.01×70-1.212026*70-0.011785*70+0.32175*70+arctan0.094251*70
        =-90-0.099669×70-0.01×70-1.212026*70-0.011785*70+0.32175*70+0.093973*70
        =-90-6.97683-0.01×70-1.212026*70-0.011785*70+0.32175*70+0.093973*70
        =-90-6.97683-0.7-1.212026*70-0.011785*70+0.32175*70+0.093973*70
        =-90-6.97683-0.7-84.84182-0.011785*70+0.32175*70+0.093973*70
        =-90-6.97683-0.7-84.84182-0.82495+0.32175*70+0.093973*70
        =-90-6.97683-0.7-84.84182-0.82495+22.5225+0.093973*70
        =-90-6.97683-0.7-84.84182-0.82495+22.5225+6.57811
        =-96.97683-0.7-84.84182-0.82495+22.5225+6.57811
        =-97.67683-84.84182-0.82495+22.5225+6.57811
        =-182.51865-0.82495+22.5225+6.57811
        =-183.3436+22.5225+6.57811
        =-160.8211+6.57811
        =-154.24299
    答案:-90-arctan0.1×70-arctan0.01×70-arctan(1/0.375)*70-arctan(1/84.85)*70+arctan(1/3)*70+arctan(1/10.61)*70=-154.24299
    注：弧度制

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