116 500 | = | 105 100 | + | r | × | 2 | + | 105 100 | r | × | 2 |
方程右边 = | 105 100 | + | r | × | 2 | + | 21 10 | r |
= | 105 100 | + | 41 10 | r |
116 500 | = | 105 100 | + | 41 10 | r |
- | 41 10 | r | = | 105 100 | − | 116 500 |
- | 41 10 | r | = | 409 500 |
- | 409 500 | = | 41 10 | r |
41 10 | r | = | - | 409 500 |
r | = | - | 409 500 | ÷ | 41 10 |
= | - | 409 500 | × | 10 41 |
= | - | 409 50 | × | 1 41 |
r | = | - | 409 2050 |
r | = | - 0.199512 |