问题 解答题
脱式计算,能简算的要简算.
[1-(
1
4
+
3
8
)]÷
1
24

4
5
7
-3
1
3
+1
2
7
-2
2
3
8
9
×[
7
8
-(
7
16
-
1
8
)]
4.6×1
3
8
+8.4÷
8
11
-1
3
8
×5.
答案

[1-(

1
4
+
3
8
)]÷
1
24

=[1-

5
8
1
24

=

3
8
×24,

=9;

4

5
7
-3
1
3
+1
2
7
-2
2
3

=(4

5
7
+1
2
7
)-(3
1
3
+2
2
3
),

=6-6,

=0;

8
9
×[
7
8
-(
7
16
-
1
8
)],

=

8
9
×[
7
8
-(
7
16
-
2
16
)],

=

8
9
×[
7
8
-
5
16
],

=

8
9
×[
14
16
-
5
16
],

=

8
9
×
9
16

=

1
2

4.6×1

3
8
+8.4÷
8
11
-1
3
8
×5,

=4.6×

11
8
+8.4×
11
8
-
11
8
×5,

=

11
8
×(4.6+8.4-5),

=

11
8
×8,

=11.

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