数学题:用哪种方法得到的税后利息多一些

  • 时间:2020-05-09 14:38:58
  • 分类:数学世界
  • 阅读:138 次

数学题:李老师有10000元,打算存入银行三年,有几种储蓄方法?用哪种方法得到的税后利息多一些?(一年期存款的年利率是3.50%,两年期存款的年利率是4.40%,三年期存款的年利率是5.00%,利息税率为5%,计算时可以使用计算器)需要算式与过程。

数学题解答:有四种储蓄方法,存三年定期得到的税后利息多一些,具体所得利息如下:

存一年定期,连存三年(自动转存) 10000×[(1+3.5%)×3-1]×(1-5%)=1032.81元

存一年定期,到期后再存两年定期 10000×[(1+3.5%)×(1+4.4%×2)-1]×(1-5%)=1197.76元

存两年定期,到期后再存一年定期 10000×[(1+4.4%×2)×(1+3.5%)-1]×(1-5%)=1197.76元

存三年定期,10000×5%×3×(1-5%)=1425元。

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