1．用分数表示：
| |
 |
 |
 |
 |
| 涂色部分 |
_________ |
_________ |
_________ |
_________ |
| 没有涂色部分 |
_________ |
_________ |
_________ |
_________ |
2．在转盘上涂红、黄、绿三种颜色，使指针停止后指在绿色区域的可能性最大．
1．用分数表示：
| |
|
|
|
|
| 涂色部分 |
_________ |
_________ |
_________ |
_________ |
| 没有涂色部分 |
_________ |
_________ |
_________ |
_________ |
2．在转盘上涂红、黄、绿三种颜色，使指针停止后指在绿色区域的可能性最大．
﹣
=
﹣
=
﹣
=
+
=
+
=
﹣
=
+
=
﹣
+
=
﹣
=
+
=
﹣
=
﹣
=
=
=
=
=．
=
=
=
=
= 1﹣
= 1﹣
=
=
+
= 1﹣
=
﹣
= 2.5×3.8×4=
+
= 10﹣9.12=
+0.25= 0.65×9+0.65=
．
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