1
00:00:00,502 --> 00:00:05,010
借助數軸比較11.5和11.7的大小關係

2
00:00:05,041 --> 00:00:06,879
那我先畫一條數軸

3
00:00:06,879 --> 00:00:09,564
主要來看11和12之間

4
00:00:09,564 --> 00:00:11,671
因爲要比較的兩個數就在這個區間裏

5
00:00:11,671 --> 00:00:14,487
它們都是11點幾

6
00:00:14,487 --> 00:00:19,179
這裡是11

7
00:00:19,179 --> 00:00:21,673
這裡是12

8
00:00:21,689 --> 00:00:24,114
然後再來畫中間的小數部分

9
00:00:24,114 --> 00:00:28,696
這是中間點

10
00:00:28,696 --> 00:00:30,102
也就是

11
00:00:30,102 --> 00:00:35,785
11.5

12
00:00:35,785 --> 00:00:37,316
好 第一步就做完了

13
00:00:37,316 --> 00:00:39,815
已經找到了11.5

14
00:00:39,815 --> 00:00:44,698
恰好就在11和12中間

15
00:00:44,698 --> 00:00:50,085
是11.5

16
00:00:50,085 --> 00:00:53,333
然後把其他的畫出來

17
00:00:53,348 --> 00:00:58,212
在數軸上都標出來

18
00:00:58,212 --> 00:01:00,711
0.1 0.2 0.3 0.4 0.5

19
00:01:00,711 --> 00:01:02,173
0.6 0.7 0.8

20
00:01:02,173 --> 00:01:06,370
0.9 然後就是12

21
00:01:06,370 --> 00:01:09,207
不是完全按比例畫的

22
00:01:09,207 --> 00:01:12,413
我已經盡量畫準確了

23
00:01:12,413 --> 00:01:16,188
那麽11.7在哪呢？看 這是11.5

24
00:01:16,188 --> 00:01:21,854
11.6 11.7

25
00:01:21,854 --> 00:01:26,173
11.7就在這裡

26
00:01:26,173 --> 00:01:31,781
0.1 0.2 0.3 0.4

27
00:01:31,797 --> 00:01:35,199
0.5 0.6 0.7

28
00:01:35,199 --> 99:59:59,999
這就是11.7