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怎样简便就怎样算: 512×14×24 42×(56-47) (23+12)×67 35×149-49×35.

编辑:chaxungu时间:2026-04-27 13:18:58分类:小学数学题库

怎样简便就怎样算:
5
12
×
1
4
×24
42×(
5
6
-
4
7
)
(
2
3
+
1
2
)×
6
7
3
5
×
14
9
-
4
9
×
3
5
.
(1)
5
12
×
1
4
×24,
=
5
12
×(
1
4
×24),
=
5
12
×6,
=
5
2
;

(2)42×(
5
6
-
4
7
),
=42×
5
6
-42×
4
7
,
=35-24,
=11;

(3)(
2
3
+
1
2
)×
6
7
,
=
2
3
×
6
7
+
1
2
×
6
7
,
=
4
7
+
3
7
,
=1;

(4)
3
5
×
14
9
-
4
9
×
3
5
,
=
3
5
×(
14
9
-
4
9
),
=
3
5
×
10
9
,
=
2
3
.