数学五年级难题1又1/100+2又2/100+3又3/100+.+99又99/100,怎么算
2019-06-01
数学五年级难题
1又1/100+2又2/100+3又3/100+.+99又99/100,怎么算
优质解答
=1+2+..+99 + (1+2+...+99)/100
=(1+99)*99/2 +(1+99)*99/2/100
=50*99+99/2
=4999.5
=1+2+..+99 + (1+2+...+99)/100
=(1+99)*99/2 +(1+99)*99/2/100
=50*99+99/2
=4999.5