题目内容
(
-
+
-
)÷(-
).
| 5 |
| 6 |
| 3 |
| 7 |
| 1 |
| 3 |
| 9 |
| 14 |
| 1 |
| 14 |
原式=(
-
+
-
)×(-14)
=
×(-14)-
×(-14)+
×(-14)-
×(-14)
=-
+6-
+9
=-
-
+6+9
=-16
+15
=-1
.
| 5 |
| 6 |
| 3 |
| 7 |
| 1 |
| 3 |
| 9 |
| 14 |
=
| 5 |
| 6 |
| 3 |
| 7 |
| 1 |
| 3 |
| 9 |
| 14 |
=-
| 35 |
| 3 |
| 14 |
| 3 |
=-
| 35 |
| 3 |
| 14 |
| 3 |
=-16
| 1 |
| 3 |
=-1
| 1 |
| 3 |
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