题目内容

脱式计算(能用简便方法的要用简便方法):
(
1
7
+
5
14
)÷
5
14
13
18
╳19-
13
18
(
3
4
+
5
8
)×32
7
9
÷
2
3
÷
7
8
3
11
×87+12÷
11
3
.
①(
1
7
+
5
14
)÷
5
14
,
=
1
2
÷
5
14
,
=
1
2
×
14
5
,
=
7
5
;

②
13
18
×19-
13
18
,
=
13
18
×(19-1),
=
13
18
×18,
=13;

③(
3
4
+
5
8
)×32,
=
3
4
×32+
5
8
×32,
=24+20,
=44;

④
7
9
÷
2
3
÷
7
8
,
=
7
9
×
3
2
×
8
7
,
=
4
3
;

⑤
3
11
×87+12÷
11
3
,
=
3
11
×87+12×
3
11
,
=
3
11
×(87+12),
=
3
11
×99,
=27.
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