【数学计算题】能简算的要简算，谢谢

64.83+5又18/19+35.17+44又1/19 =(64.83+35.17)+(5又18/19+44又1/19) =100+50 =150 34又3/4-（2又3/19-15.25） =34又3/4-2又3/19+15.25 =34又3/4+15.25-2又3/19 =34又3/4+15又1/4-2又3/19 =50-2又3/19 =47又16/19 2又1/2×