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(2012•溧水县模拟)计算下面各题(能简便计算的要简便计算)13×70-4872÷249.43-2.6+8.57-3.4(2.8-1.6)×0.8÷3.2514×87-514÷7(16÷512-16)÷7834×[32÷(78-45)].
题目详情
(2012•溧水县模拟)计算下面各题(能简便计算的要简便计算)
13×70-4872÷24 | 9.43-2.6+8.57-3.4 | ||||||||||||||||
(2.8-1.6)×0.8÷3.2 |
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▼优质解答
答案和解析
(1)13×70-4872÷24,
=910-203,
=707;
(2)9.43-2.6+8.57-3.4,
=(9.43+8.57)-(2.6+3.4),
=18-6,
=12;
(3)(2.8-1.6)×0.8÷3.2,
=1.2×0.8÷3.2,
=0.96÷3.2,
=0.3;
(4)
×
-
÷7,
=
×
-
×
,
=
×(
-
),
=
×1,
=
;
(5)(
÷
-
)÷
,
=(
×
-
)×
,
=
×(
-1)×
,
=
×
×
,
=
;
(6)
×[
÷(
=910-203,
=707;
(2)9.43-2.6+8.57-3.4,
=(9.43+8.57)-(2.6+3.4),
=18-6,
=12;
(3)(2.8-1.6)×0.8÷3.2,
=1.2×0.8÷3.2,
=0.96÷3.2,
=0.3;
(4)
5 |
14 |
8 |
7 |
5 |
14 |
=
5 |
14 |
8 |
7 |
5 |
14 |
1 |
7 |
=
5 |
14 |
8 |
7 |
1 |
7 |
=
5 |
14 |
=
5 |
14 |
(5)(
1 |
6 |
5 |
12 |
1 |
6 |
7 |
8 |
=(
1 |
6 |
12 |
5 |
1 |
6 |
8 |
7 |
=
1 |
6 |
12 |
5 |
8 |
7 |
=
1 |
6 |
7 |
5 |
8 |
7 |
=
4 |
15 |
(6)
3 |
4 |
3 |
2 |
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