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计算:(1)(-85)×(-25)×(-4);(2)-215×2311÷(−212);(3)(−124)÷(134−78+712);(4)(79−56+34−718)×36.
题目详情
计算:
(1)(-85)×(-25)×(-4);
(2)-2
×2
÷(−2
);
(3)(−
)÷(1
−
+
);
(4)(
−
+
−
)×36.
(1)(-85)×(-25)×(-4);
(2)-2
1 |
5 |
3 |
11 |
1 |
2 |
(3)(−
1 |
24 |
3 |
4 |
7 |
8 |
7 |
12 |
(4)(
7 |
9 |
5 |
6 |
3 |
4 |
7 |
18 |
▼优质解答
答案和解析
(1)(-85)×(-25)×(-4),
=(-85)×[(-25)×(-4)],
=-85×100,
=-8500;
(2)-2
×2
÷(-2
),
=-
×
×(-
),
=2;
(3)(-
)÷(1
-
+
),
=(-
)÷(
-
+
),
=(-
)÷
,
=(-
)×
,
=-
;
(4)(
-
+
-
)×36,
=
×36-
×36+
×36-
×36,
=28-30+27-14,
=55-44,
=11.
=(-85)×[(-25)×(-4)],
=-85×100,
=-8500;
(2)-2
1 |
5 |
3 |
11 |
1 |
2 |
=-
11 |
5 |
25 |
11 |
2 |
5 |
=2;
(3)(-
1 |
24 |
3 |
4 |
7 |
8 |
7 |
12 |
=(-
1 |
24 |
42 |
24 |
21 |
24 |
14 |
24 |
=(-
1 |
24 |
11 |
24 |
=(-
1 |
24 |
24 |
11 |
=-
1 |
11 |
(4)(
7 |
9 |
5 |
6 |
3 |
4 |
7 |
18 |
=
7 |
9 |
5 |
6 |
3 |
4 |
7 |
18 |
=28-30+27-14,
=55-44,
=11.
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