问题 解答题
脱式计算,能简算的要简算.
1
4
+
1
8
+
1
16
)÷
1
24
1
5
×11-
5
9
×
3
4
-
5
9
×
1
4
12×(
2
3
+
1
4
-
1
6
1
12
+
3
47
)×12-36÷47
23-
8
9
×
3
4
÷
1
27
[1-(
1
4
+
3
8
)]÷
1
4
答案

(1)(

1
4
+
1
8
+
1
16
)÷
1
24

=(

1
4
+
1
8
+
1
16
)×24,

=24×

1
4
+
1
8
×24+
1
16
×24,

=6+3+

3
2

=9+

3
2

=10

1
2

(2)

1
5
×11-
5
9
×
3
4
-
5
9
×
1
4

=(

1
5
×11)-[
5
9
×(
3
4
+
1
4
)],

=(

1
5
×11)-(
5
9
×1),

=

11
5
-
5
9

=

74
45

(3)12×(

2
3
+
1
4
-
1
6
),

=12×

2
3
+12×
1
4
-12×
1
6

=8+3-2,

=9;

(4)(

1
12
+
3
47
)×12-36÷47,

=

1
12
×12+
3
47
×12-36÷47,

=1+

36
47
-
36
47

=1+(

36
47
-
36
47
),

=1+0,

=1;

(5)23-

8
9
×
3
4
÷
1
27

=23-

2
3
÷
1
27

=23-18,

=5;

(6)[1-(

1
4
+
3
8
)]÷
1
4

=[1-

5
8
1
4

=

3
8
÷
1
4

=

3
2

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