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84×[10.8÷(48.6+5.4)-0.2][(514-4.25)×58]÷38+3.3÷1562014×(3.4×69+3.5)3.5×69−3.41-3+5-7+9-11+13-…-39+41729×38+629×712+329×79121+2022121+50505212121+1313131321212121(1-32×4)×(1-33×5)×(1-34×6
题目详情
84×[10.8÷(48.6+5.4)-0.2] | [(5
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| 1-3+5-7+9-11+13-…-39+41 | ||||||||||||||||||||
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(1-
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▼优质解答
答案和解析
(1)84×[10.8÷(48.6+5.4)-0.2],
=84×[10.8÷54-0.2],
=84×[0.2-0.2],
=0;
(2)[(5
-4.25)×
]÷
+3.3÷1
,
=[(5.25-4.25)×
]÷
+3.3×
,
=
×
+1.8,
=
+1
,
=3
;
(3)
,
=
,
=
,
=2014;
(4)1-3+5-7+9-11+13-…-39+41,
=(1-3)+(5-7)+(9-11)+…+(37-39)+41,
=41-2-2-2-…-2,
=41-2×10,
=41-20,
=21;
(5)
×
+
×
+
×
,
=
×
+
×
+
×
,
=
×(
=84×[10.8÷54-0.2],
=84×[0.2-0.2],
=0;
(2)[(5
1 |
4 |
5 |
8 |
3 |
8 |
5 |
6 |
=[(5.25-4.25)×
5 |
8 |
3 |
8 |
6 |
11 |
=
5 |
8 |
8 |
3 |
=
5 |
3 |
4 |
5 |
=3
7 |
15 |
(3)
2014×(3.4×69+3.5) |
3.5×69−3.4 |
=
2014×(3.4×69+3.5) |
(3.4+0.1)×69−3.4 |
=
2014×(3.4×69+3.5) |
3.4×69+3.5 |
=2014;
(4)1-3+5-7+9-11+13-…-39+41,
=(1-3)+(5-7)+(9-11)+…+(37-39)+41,
=41-2-2-2-…-2,
=41-2×10,
=41-20,
=21;
(5)
7 |
29 |
3 |
8 |
6 |
29 |
7 |
12 |
3 |
29 |
7 |
9 |
=
7 |
29 |
3 |
8 |
7 |
29 |
1 |
2 |
7 |
29 |
1 |
3 |
=
7 |
29 |
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