题目内容
计算:(
+
)-(
-
+
)
| 27 |
|
| 12 |
|
| 80 |
原式=(
+
)-(
-
+
)
=(3
+
)-(2
-
+4
)
=
-4
.
| 3×9 |
| ||
| 3 |
| 3×4 |
| ||
| 3 |
| 16×5 |
=(3
| 3 |
| 1 |
| 3 |
| 3 |
| 3 |
| 1 |
| 3 |
| 3 |
| 3 |
=
| 5 |
| 3 |
| 3 |
| 5 |
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题目内容
| 27 |
|
| 12 |
|
| 80 |
| 3×9 |
| ||
| 3 |
| 3×4 |
| ||
| 3 |
| 16×5 |
| 3 |
| 1 |
| 3 |
| 3 |
| 3 |
| 1 |
| 3 |
| 3 |
| 3 |
| 5 |
| 3 |
| 3 |
| 5 |