1/100+2/100+3/100+4/100.+97/100+98/100+99/100 用简便方法计算明天就要
问题描述:
1/100+2/100+3/100+4/100.+97/100+98/100+99/100 用简便方法计算
明天就要
答
1/100+2/100+3/100+4/100.+97/100+98/100+99/100
=(1/100+99/100)+(2/100+98/100)+...+(49/100+51/100)+50/100
=49×1+50/100
=49+1/2
=49.5