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下面各题.怎样简便就怎样算 12÷54÷215 ( 79+527)×54 14÷(34×215) 56×78+56×18 385×86 (35+310)÷710.

编辑:chaxungu时间:2026-04-27 13:18:43分类:小学数学题库

下面各题,怎样简便就怎样算
1
2
÷
5
4
÷
2
15
(
7
9
+
5
27
)×54
14÷(
3
4
×
21
5
)
5
6
×
7
8
+
5
6
×
1
8
3
85
×86
(
3
5
+
3
10
)÷
7
10
.
(1)
1
2
÷
5
4
÷
2
15
,
=
1
2
×
4
5
×
15
2
,
=3;

(2)(
7
9
+
5
27
)×54,
=
7
9
×54+
5
27
×54,
=42+10,
=52;

(3)14÷(
3
4
×
21
5
),
=14÷
63
20
,
=14×
20
63
,
=
40
9
;

(4)
5
6
×
7
8
+
5
6
×
1
8
,
=
5
6
×(
7
8
+
1
8
),
=
5
6
;

(5)
3
85
×86,
=
3
85
×85+
3
85
,
=3
3
85
;

(6)(
3
5
+
3
10
)÷
7
10
,
=
9
10
×
10
7
,
=
9
7
.