问题 解答题
计算下面各题.
(
1
2
-
1
4
)×40
13×
3
4
+3÷
4
3
+
3
4
[2-(
1
3
+
8
5
)]÷
2
15
1
2
+(
3
7
×
1
6
÷
5
28
)
(
1
2
-
1
4
)÷(
1
2
+
1
4
)
36×[
2
3
-(
1
12
+
1
6
)]
答案

(1)(

1
2
-
1
4
)×40

=

1
2
×40-
1
4
×40

=20-10

=10;

(2)13×

3
4
+3÷
4
3
+
3
4

=(13+3+1)×

3
4

=17×

3
4

=12

3
4

(3)[2-(

1
3
+
8
5
)]÷
2
15

=[2-

29
15
]÷
2
15

=

1
15
÷
2
15

=

1
2

(4)

1
2
+(
3
7
×
1
6
÷
5
28

=

1
2
+(
1
14
÷
5
28

=

1
2
+
2
5

=

9
10

(5)(

1
2
-
1
4
)÷(
1
2
+
1
4

=

1
4
÷
3
4

=

1
3

(6)36×[

2
3
-(
1
12
+
1
6
)]

=36×[

2
3
-
1
4
].

=36×

2
3
-36×
1
4

=24-9

=15.

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