题目内容
(
-
+
)×36.
| 7 |
| 9 |
| 5 |
| 6 |
| 3 |
| 4 |
(
-
+
)×36,
=
×36-
×36+
×36,
=28-25+27,
=55-25,
=30.
| 7 |
| 9 |
| 5 |
| 6 |
| 3 |
| 4 |
=
| 7 |
| 9 |
| 5 |
| 6 |
| 3 |
| 4 |
=28-25+27,
=55-25,
=30.
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