题目内容

下面各题,怎样算简便就怎样算.
①9.56+4.875-
7
8
+1.44

②
3
4
÷6-
1
6
×
1
4
③13÷(
1
4
+
5
6
)×
3
4
④
8
9
×[
3
4
-(
7
16
-
1
4
)]
⑤[1-(
3
8
+
1
4
)]×
2
39
⑥
8
15
×[
5
6
÷(
7
9
-
1
3
)]
.
①9.56+4.875-
7
8
+1.44,
=(9.56+1.44)+(4.875-
7
8
),
=11+4,
=15;

②
3
4
÷6-
1
6
×
1
4
,
=
3
4
×
1
6
-
1
6
×
1
4
,
=
1
6
×(
3
4
-
1
4
),
=
1
6
×
1
2
,
=
1
12
;

③13÷(
1
4
+
5
6
)×
3
4
,
=13÷
13
12
×
3
4
,
=13×
12
13
×
3
4
,
=9;

④
8
9
×[
3
4
-(
7
16
-
1
4
)],
=
8
9
×[
3
4
-
3
16
],
=
8
9
×
9
16
,
=
1
2
;

⑤[1-(
3
8
+
1
4
)]×
2
39
,
=[1-
5
8
]×
2
39
,
=
3
8
×
2
39
,
=
1
52
;

⑥
8
15
×[
5
6
÷(
7
9
-
1
3
)],
=
8
15
×[
5
6
÷
4
9
],
=
8
15
×
15
8
,
=1.
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