数学学学

来源：百度知道 编辑：UC知道 时间：2024/07/02 11:59:03
计算（3＋4/5）×1234＋7777÷35/186＋543.2×38和

1/5＋1/(5×5)＋1/(5×5×5)＋1/(5×5×5×5)＋1/(5×5×5×5×5)

第一题

(3+0.8)×1234+7777÷35×186＋543.2×38
=38×123.4+222.2×186+38×543.2
=38×(123.4+543.2)+222.2×186
=38×666.6+666.6×62
=(38+62)×666.6
=100×666.6
=66660

66660和781/3125

1/5+1/(5*5)+1/(5*5*5)+1/(5*5*5*5)+1/(5*5*5*5*5) = 0.24992

http://www.baidu.com/s?cl=3&wd=1%2F5%A3%AB1%2F%285%A1%C15%29%A3%AB1%2F%285%A1%C15%A1%C15%29%A3%AB1%2F%285%A1%C15%A1%C15%A1%C15%29%A3%AB1%2F%285%A1%C15%A1%C15%A1%C15%A1%C15%29%20