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计算:(1)(78.6-0.786×25+75%×21.4)÷15×2001(2)1.65÷(14+0.8)-(0.5+13)×2435(3)(2514×23-62.5%)÷[(1312+6.375)÷111415](4)2-(716×223+17)×11011÷(1213-3.75÷514)
题目详情
计算:
(1)(78.6-0.786×25+75%×21.4)÷15×2001
(2)1.65÷(
+0.8)-(0.5+
)×
(3)(2
×
-62.5%)÷[(
+6.375)÷11
]
(4)2-(
×2
+
)×1
÷(12
-3.75÷
)
(1)(78.6-0.786×25+75%×21.4)÷15×2001
(2)1.65÷(
1 |
4 |
1 |
3 |
24 |
35 |
(3)(2
5 |
14 |
2 |
3 |
13 |
12 |
14 |
15 |
(4)2-(
7 |
16 |
2 |
3 |
1 |
7 |
10 |
11 |
1 |
3 |
5 |
14 |
▼优质解答
答案和解析
(1)(78.6-0.786×25+75%×21.4)÷15×2001
=(0.786×100-0.786×25+0.75×21.4)÷15×2001
=[0.786×(100-25)+75×0.214]÷15×2001
=[0.786×75+75×0.214]÷15×2001
=(0.786+0.214)×75÷15×2001
=1×75÷15×2001
=5×2001
=10005;
(2)1.65÷(
+0.8)-(0.5+
)×
=
÷(
+
)-(
+
)×
=
÷
-
×
=
-
=1;
(3))(2
×
-62.5%)÷[(
+6.375)÷11
]
=(
×
−
)÷[(
+
)÷
]
=(
-
)÷[
÷
]
=
÷
=
(4)2-(
×2
+
)×1
÷(12
-3.75÷
)
=2-(
+
)×
÷(
-
)
=2-
×
÷
=2-
÷
=2-
=
.
=(0.786×100-0.786×25+0.75×21.4)÷15×2001
=[0.786×(100-25)+75×0.214]÷15×2001
=[0.786×75+75×0.214]÷15×2001
=(0.786+0.214)×75÷15×2001
=1×75÷15×2001
=5×2001
=10005;
(2)1.65÷(
1 |
4 |
1 |
3 |
24 |
35 |
=
33 |
20 |
1 |
4 |
4 |
5 |
1 |
2 |
1 |
3 |
24 |
35 |
=
33 |
20 |
21 |
20 |
5 |
6 |
24 |
35 |
=
11 |
7 |
4 |
7 |
=1;
(3))(2
5 |
14 |
2 |
3 |
13 |
12 |
14 |
15 |
=(
33 |
14 |
2 |
3 |
5 |
8 |
13 |
12 |
51 |
8 |
179 |
15 |
=(
11 |
7 |
5 |
8 |
179 |
24 |
179 |
15 |
=
53 |
56 |
5 |
8 |
=
53 |
35 |
(4)2-(
7 |
16 |
2 |
3 |
1 |
7 |
10 |
11 |
1 |
3 |
5 |
14 |
=2-(
7 |
6 |
1 |
7 |
21 |
11 |
37 |
3 |
21 |
2 |
=2-
55 |
42 |
21 |
11 |
11 |
6 |
=2-
5 |
2 |
11 |
6 |
=2-
15 |
11 |
=
7 |
11 |
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