题目内容
在4个
之间填上合适的运算符号(也可加括号),使等式成立.
=
.
| 1 |
| 3 |
| 1 |
| 3 |
-
-
| 1 |
| 3 |
×
×
| 1 |
| 3 |
+
+
| 1 |
| 3 |
| 5 |
| 9 |
分析:因为
×
=
,
-
=
,
+
=
,据此添加运算符号即可.
| 1 |
| 3 |
| 1 |
| 3 |
| 1 |
| 9 |
| 1 |
| 3 |
| 1 |
| 9 |
| 2 |
| 9 |
| 2 |
| 9 |
| 1 |
| 3 |
| 5 |
| 9 |
解答:解:
-
×
+
,
=
-
+
,
=
;
故答案为:-,×,+.
| 1 |
| 3 |
| 1 |
| 3 |
| 1 |
| 3 |
| 1 |
| 3 |
=
| 1 |
| 3 |
| 1 |
| 9 |
| 1 |
| 3 |
=
| 5 |
| 9 |
故答案为:-,×,+.
点评:观察题干,综合分析数字以及运算符号的特点进行解答.
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