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(2013•无锡)下面各题怎样简便就怎样算97.5-(0.6+9.4÷0.2)3.2×12.5×2.524×(23-14+512)38-25+78-3556×[2÷(78−34)]58×111-14÷11

题目详情
(2013•无锡)
下面各题怎样简便就怎样算
97.5-(0.6+9.4÷0.2)
3.2×12.5×2.524×(
2
3
-
1
4
+
5
12
3
8
-
2
5
+
7
8
-
3
5
5
6
×[2÷(
7
8
3
4
)]
5
8
×
1
11
-
1
4
÷11
▼优质解答
答案和解析
(1)97.5-(0.6+9.4÷0.2)
=97.5-(0.6+47)
=97.5-47.6
=49.9;

(2)3.2×12.5×2.5
=(4×0.8)×12.5×2.5
=(4×2.5)×(0.8×12.5)
=10×10
=100;

(3)24×(
2
3
-
1
4
+
5
12

=24×
2
3
-24×
1
4
+24×
5
12

=16-6+10
=10+10
=20;

(4)
3
8
-
2
5
+
7
8
-
3
5

=(
3
8
+
7
8
)-(
2
5
+
3
5

=
5
4
-1
=
1
4


(5)
5
6
×[2÷(
7
8
3
4
)]
=
5
6
×[2÷
1
8
]
=
5
6
×16
=
40
3


(6)
5
8
×
1
11
-
1
4
÷11
=
5
8
×
1
11
-
1
4
×
1
11

=(
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