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-arctan0.1×50-arctan0.01×50-arctan(1/0.375)*50-arctan(1/84.85)*50+arctan(1/3)*50+arctan(1/10.61)*50 的值.
    题型：数学计算
    解:
          -90-arctan0.1×50-arctan0.01×50-arctan(1/0.375)*50-arctan(1/84.85)*50+arctan(1/3)*50+arctan(1/10.61)*50
        =-90-arctan0.1×50-arctan0.01×50-arctan2.666667*50-arctan(1/84.85)*50+arctan(1/3)*50+arctan(1/10.61)*50
        =-90-arctan0.1×50-arctan0.01×50-arctan2.666667*50-arctan0.011786*50+arctan(1/3)*50+arctan(1/10.61)*50
        =-90-arctan0.1×50-arctan0.01×50-arctan2.666667*50-arctan0.011786*50+arctan0.333333*50+arctan(1/10.61)*50
        =-90-arctan0.1×50-arctan0.01×50-arctan2.666667*50-arctan0.011786*50+arctan0.333333*50+arctan0.094251*50
        =-90-0.099669×50-arctan0.01×50-arctan2.666667*50-arctan0.011786*50+arctan0.333333*50+arctan0.094251*50
        =-90-0.099669×50-0.01×50-arctan2.666667*50-arctan0.011786*50+arctan0.333333*50+arctan0.094251*50
        =-90-0.099669×50-0.01×50-1.212026*50-arctan0.011786*50+arctan0.333333*50+arctan0.094251*50
        =-90-0.099669×50-0.01×50-1.212026*50-0.011785*50+arctan0.333333*50+arctan0.094251*50
        =-90-0.099669×50-0.01×50-1.212026*50-0.011785*50+0.32175*50+arctan0.094251*50
        =-90-0.099669×50-0.01×50-1.212026*50-0.011785*50+0.32175*50+0.093973*50
        =-90-4.98345-0.01×50-1.212026*50-0.011785*50+0.32175*50+0.093973*50
        =-90-4.98345-0.5-1.212026*50-0.011785*50+0.32175*50+0.093973*50
        =-90-4.98345-0.5-60.6013-0.011785*50+0.32175*50+0.093973*50
        =-90-4.98345-0.5-60.6013-0.58925+0.32175*50+0.093973*50
        =-90-4.98345-0.5-60.6013-0.58925+16.0875+0.093973*50
        =-90-4.98345-0.5-60.6013-0.58925+16.0875+4.69865
        =-94.98345-0.5-60.6013-0.58925+16.0875+4.69865
        =-95.48345-60.6013-0.58925+16.0875+4.69865
        =-156.08475-0.58925+16.0875+4.69865
        =-156.674+16.0875+4.69865
        =-140.5865+4.69865
        =-135.88785
    答案:-90-arctan0.1×50-arctan0.01×50-arctan(1/0.375)*50-arctan(1/84.85)*50+arctan(1/3)*50+arctan(1/10.61)*50=-135.88785
    注：弧度制

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