1
00:00:00,335 --> 00:00:07,886
珍奈爾正在爲公路賽訓練

2
00:00:07,886 --> 00:00:22,349
她的計步器記錄了每天她跑的距離

3
00:00:22,365 --> 00:00:25,875
這是她四天來計步器的讀數：

4
00:00:25,887 --> 00:00:33,995
周六 3.89英裏 周日 5.1英裏

5
00:00:34,009 --> 00:00:42,730
周一 10.21英裏 周二 3.35英裏

6
00:00:42,730 --> 00:00:44,920
估算四天來她跑的裏程數

7
00:00:44,920 --> 00:00:51,070
然後計算出準確數值

8
00:00:51,130 --> 00:00:55,980
先來估算一下

9
00:00:55,980 --> 00:00:59,682
我就把它們都四捨五入取整

10
00:00:59,750 --> 00:01:06,933
3.89 約等於4英裏

11
00:01:06,960 --> 00:01:10,172
因爲十分位上

12
00:01:10,195 --> 00:01:14,910
是8 大於5

13
00:01:15,079 --> 00:01:21,669
所以大約就等於4英裏

14
00:01:21,716 --> 00:01:28,416
然後看5.1