题目内容
(1)-
×
×(-
)
(2)(
-
)÷1
÷
(3)(
-
-
)÷(-
)+(-
)
1 |
2 |
7 |
8 |
3 |
4 |
(2)(
1 |
3 |
1 |
2 |
1 |
4 |
1 |
10 |
(3)(
7 |
4 |
7 |
8 |
7 |
12 |
7 |
8 |
8 |
3 |
(1)-
×
×(-
)=
;
(2)(
-
)÷1
÷
=-
×
×10
=-
;
(3)(
-
-
)÷(-
)+(-
)
=-
×
+
×
+
×
+(-
)
=-2+1+
-
=-2+1-2
=-3.
1 |
2 |
7 |
8 |
3 |
4 |
21 |
64 |
(2)(
1 |
3 |
1 |
2 |
1 |
4 |
1 |
10 |
=-
1 |
6 |
4 |
5 |
=-
4 |
3 |
(3)(
7 |
4 |
7 |
8 |
7 |
12 |
7 |
8 |
8 |
3 |
=-
7 |
4 |
8 |
7 |
7 |
8 |
8 |
7 |
7 |
12 |
8 |
7 |
8 |
3 |
=-2+1+
2 |
3 |
8 |
3 |
=-2+1-2
=-3.
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