计算:1.725+2.725+3.725+4.725+.60.725

问题描述:

计算:1.725+2.725+3.725+4.725+.60.725

解析,
1.725+2.725+3.725+4.725+……+60.725
=(1+2+3+……+60)+(0.725+0.725+……+0.725)
=(1+60)*60/2+0.725*60
=1830+43.5
=1873.5