题目内容
计算
(1)-3+8+(-7);
(2)
-
+(-
)-
;
(3)(
-
+
)×(-36);
(4)(-
)4.
(1)-3+8+(-7);
(2)
| 5 |
| 6 |
| 2 |
| 7 |
| 1 |
| 6 |
| 5 |
| 7 |
(3)(
| 1 |
| 2 |
| 5 |
| 9 |
| 7 |
| 12 |
(4)(-
| 2 |
| 3 |
(1)-3+8+(-7)
=-3+8-7
=-10+8
=-2;
(2)
-
+(-
)-
=(
-
)+(-
-
)
=
-1
=-
;
(3)(
-
+
)×(-36)
=-
×36+
×36-
×36
=-18+20-21
=-19;
(4)(-
)4=
.
=-3+8-7
=-10+8
=-2;
(2)
| 5 |
| 6 |
| 2 |
| 7 |
| 1 |
| 6 |
| 5 |
| 7 |
=(
| 5 |
| 6 |
| 1 |
| 6 |
| 5 |
| 7 |
| 2 |
| 7 |
=
| 2 |
| 3 |
=-
| 1 |
| 3 |
(3)(
| 1 |
| 2 |
| 5 |
| 9 |
| 7 |
| 12 |
=-
| 1 |
| 2 |
| 5 |
| 9 |
| 7 |
| 12 |
=-18+20-21
=-19;
(4)(-
| 2 |
| 3 |
| 16 |
| 81 |
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