题目内容
(
-
+
)÷(-
)
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| 3 |
| 11 |
| 21 |
| 3 |
| 14 |
| 1 |
| 42 |
原式=(
-
+
)×(-42)
=
×(-42)-
×(-42)+
×(-42)
=-14+22-9
=-1.
| 1 |
| 3 |
| 11 |
| 21 |
| 3 |
| 14 |
=
| 1 |
| 3 |
| 11 |
| 21 |
| 3 |
| 14 |
=-14+22-9
=-1.
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