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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