题目内容
76×（
-
）+23×（
+
）-53×（
-
）
| 1 |
| 23 |
| 1 |
| 53 |
| 1 |
| 53 |
| 1 |
| 76 |
| 1 |
| 23 |
| 1 |
| 76 |
76×（
-
）+23×（
+
）-53×（
-
），
=76×
-76×
+23×
+23×
-53×
+53×
，
=
-
+
+
-
+
，
=（
-
）-（
-
）+（
+
），
=1-1+1，
=1．
| 1 |
| 23 |
| 1 |
| 53 |
| 1 |
| 53 |
| 1 |
| 76 |
| 1 |
| 23 |
| 1 |
| 76 |
=76×
| 1 |
| 23 |
| 1 |
| 53 |
| 1 |
| 53 |
| 1 |
| 76 |
| 1 |
| 23 |
| 1 |
| 76 |
=
| 76 |
| 23 |
| 76 |
| 53 |
| 23 |
| 53 |
| 23 |
| 76 |
| 53 |
| 23 |
| 53 |
| 76 |
=（
| 76 |
| 23 |
| 53 |
| 23 |
| 76 |
| 53 |
| 23 |
| 53 |
| 23 |
| 76 |
| 53 |
| 76 |
=1-1+1，
=1．
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