1+2+3+4+5+6+7+8+9+10+.+123+124+125+126+127.+963585+963586=?

问题描述:

1+2+3+4+5+6+7+8+9+10+.+123+124+125+126+127.+963585+963586=?

用表格一算就好啦,

1+2+3+4+5+6+7+8+9+10+............+123+124+125+126+127..........+963585+963586
963586+963585+................................................................................+1+ 2
上下对应的数相加,为963587,逐一相加,有963586数。所以,(963587×963586)/2就是所求的值

(1+963586)*963586/2=464249471491

464249953285