问题 解答题
下面各题,怎样计算简便就怎样算.
95.6×108-95.6×8(8.1-8.1×
5
6
)÷
9
4
14
5
-(2.8-
5
7
)+
2
7
9.4×
1
4
+0.25×
3
5
3
7
-[
19
5
-(
14
5
+
4
7
)]
3
5
÷[(
1
5
+
1
3
)÷
2
9
].
答案

(1)95.6×108-95.6×8

=95.6×(108-8)

=95.6×100

=9560;

(2)(8.1-8.1×

5
6
)÷
9
4

=[8.1×(1-

5
6
)]÷
9
4

=[8.1×

1
6
9
4

=1.35÷

9
4

=0.6;

(3)

14
5
-(2.8-
5
7
)+
2
7

=

14
5
-2.8+
5
7
+
2
7

=(

14
5
-2.8)+(
5
7
+
2
7

=0+1

=1;

(4)9.4×

1
4
+0.25×
3
5

=9.4×0.25+0.25×

3
5

=(9.4+

3
5
)×0.25

=10×0.25

=2.5;

(5)

3
7
-[
19
5
-(
14
5
+
4
7
)]

=

3
7
-[
19
5
-
14
5
-
4
7
]

=

3
7
-[1-
4
7
]

=

3
7
-
3
7

=0;

(6)

3
5
÷[(
1
5
+
1
3
)÷
2
9
]

=

3
5
÷[
8
15
÷
2
9
]

=

3
5
÷
12
5

=

1
4

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