| 299 |
| 300 |
=（299×
| 1 |
| 299 |
| 299 |
| 300 |
| 1 |
| 299 |
=1÷[1+
| 1 |
| 300 |
=1÷
| 301 |
| 300 |
=
| 300 |
| 301 |
4×0.8×2.5×12.5，
=（4×2.5）×（0.8×12.5），
=10×10，
=100；
84
| 18 |
| 19 |
| 1 |
| 19 |
| 3 |
| 8 |
=84
| 18 |
| 19 |
| 3 |
| 8 |
| 1 |
| 19 |
| 3 |
| 8 |
=（84
| 18 |
| 19 |
| 1 |
| 19 |
| 3 |
| 8 |
=190×
| 3 |
| 8 |
=71.25．
| 299 |
| 300 |
| 18 |
| 19 |
| 1 |
| 19 |
| 3 |
| 8 |
| 299 |
| 300 |
| 1 |
| 299 |
| 299 |
| 300 |
| 1 |
| 299 |
| 1 |
| 300 |
| 301 |
| 300 |
| 300 |
| 301 |
| 18 |
| 19 |
| 1 |
| 19 |
| 3 |
| 8 |
| 18 |
| 19 |
| 3 |
| 8 |
| 1 |
| 19 |
| 3 |
| 8 |
| 18 |
| 19 |
| 1 |
| 19 |
| 3 |
| 8 |
| 3 |
| 8 |