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4.56×0.27+483×0.0456+1.9×4.56+0.456×304-(35-12+13)X-0.4X-1.2=13.2712+114+3316+99112.
题目详情
4.56×0.27+483×0.0456+1.9×4.56+0.456×30 | 4-(
| ||||||||
X-0.4X-1.2=13.2 | 7
|
▼优质解答
答案和解析
(1)4.56×0.27+483×0.0456+1.9×4.56+0.456×30,
=0.0456×(27+483+190+300),
=0.0456×1000,
=45.6;
(2)4-(
-
+
),
=4-(
-
+
),
=4-
,
=3
;
(3)X-0.4X-1.2=13.2,
X-0.4X-1.2+1.2=13.2+1.2,
0.6X=14.4,
0.6X÷0.6=14.4÷0.6,
X=24;
(4)7
+1
+33
+99
,
=(7+1+33+99)+(
+
+
+
),
=[(7+33)+(1+99)]+(1-
+
-
+
-
+
-
),
=140+(1-
+
-
),
=140+1,
=141.
=0.0456×(27+483+190+300),
=0.0456×1000,
=45.6;
(2)4-(
3 |
5 |
1 |
2 |
1 |
3 |
=4-(
18 |
30 |
15 |
30 |
10 |
30 |
=4-
13 |
30 |
=3
17 |
30 |
(3)X-0.4X-1.2=13.2,
X-0.4X-1.2+1.2=13.2+1.2,
0.6X=14.4,
0.6X÷0.6=14.4÷0.6,
X=24;
(4)7
1 |
2 |
1 |
4 |
1 |
6 |
1 |
12 |
=(7+1+33+99)+(
1 |
2 |
1 |
4 |
1 |
6 |
1 |
12 |
=[(7+33)+(1+99)]+(1-
1 |
2 |
1 |
2 |
1 |
4 |
1 |
2 |
1 |
3 |
1 |
3 |
1 |
4 |
=140+(1-
1 |
4 |
1 |
2 |
1 |
4 |
=140+1,
=141.
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