题目内容

计算下列各题,能简算的要简算.
4
5
-(
2
3
-
1
5
)〕÷
2
3
=

5
6
÷5+5÷
5
6
=
16
21
÷〔
1
6
÷(
3
4
-
1
2
)〕=
48×
3
7
+3÷7=
1
6
×
2
3
÷(
4
5
-
8
15
)=
62.5%×15+2×
5
8
-5÷8=
(1)[
4
5
-(
2
3
-
1
5
)]÷
2
3

=[
4
5
-
2
3
+
1
5
2
3

=[
4
5
+
1
5
-
2
3
2
3

=[1-
2
3
2
3

=
1
3
÷
2
3

=
1
2


(2)
5
6
÷5+5÷
5
6

=
1
6
+6,
=6
1
6


(3)
16
21
÷[
1
6
÷(
3
4
-
1
2
)],
=
16
21
÷[
1
6
÷
1
4
],
=
16
21
÷
2
3

=
8
7


(4)48×
3
7
+3÷7,
=48×
3
7
+
3
7

=(48+1)×
3
7

=49×
3
7

=21;

(5)
1
6
×
2
3
÷(
4
5
-
8
15
),
=
1
6
×
2
3
÷
4
15

=
1
9
÷
4
15

=
5
12


(6)62.5%×15+2×
5
8
-5÷8,
=
5
8
×15+2×
5
8
-
5
8

=
5
8
×(15+2-1),
=
5
8
×16,
=10.
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