借款10万两年还清一个月还多少本金？

假设借款10万元，年利率为x，两年还清，每月还款，则每月应还本金为：

$$每月本金 = 借款金额 (1 - (1 + 年利率/12)^(-24)) / 24$$

以年利率5%为例，每月应还本金为：

$$每月本金 = 100000 (1 - (1 + 0.05/12)^(-24)) / 24 = 4159.88元$$

还款计划

以下为两年还款计划：

| 期数 | 本金 (元) | 利息 (元) | 余额 (元) |

|---|---|---|---|

| 1 | 4159.88 | 416.67 | 95840.12 |

| 2 | 4159.88 | 395.83 | 91680.24 |

| 3 | 4159.88 | 374.60 | 87520.36 |

| 4 | 4159.88 | 353.02 | 83360.48 |

| 5 | 4159.88 | 331.09 | 79200.60 |

| 6 | 4159.88 | 308.81 | 75040.72 |

| 7 | 4159.88 | 286.19 | 70880.84 |

| 8 | 4159.88 | 263.24 | 66720.96 |

| 9 | 4159.88 | 240.00 | 62561.08 |

| 10 | 4159.88 | 216.47 | 58401.20 |

| 11 | 4159.88 | 192.67 | 54241.32 |

| 12 | 4159.88 | 168.61 | 50081.44 |

| 13 | 4159.88 | 144.28 | 45921.56 |

| 14 | 4159.88 | 119.69 | 41761.68 |

| 15 | 4159.88 | 94.85 | 37601.80 |

| 16 | 4159.88 | 69.76 | 33441.92 |

| 17 | 4159.88 | 44.43 | 29282.04 |

| 18 | 4159.88 | 18.86 | 25122.16 |

| 19 | 4159.88 | 3.06 | 20962.28 |

| 20 | 4159.88 | 0.00 | 16802.40 |

| 21 | 4159.88 | 0.00 | 12642.52 |

| 22 | 4159.88 | 0.00 | 8482.64 |

| 23 | 4159.88 | 0.00 | 4322.76 |

| 24 | 4159.88 | 0.00 | 0.00 |