题目内容

用自己喜欢的方法计算.
(
1
12
+
1
4
)×24
5
7
×
7
9
+
2
9
×
5
7
3
4
×11+
3
4
46×
44
45
.
(1)(
1
12
+
1
4
)×24,
=
1
12
×24+
1
4
×24,
=2+6,
=8;

(2)
5
7
×
7
9
+
2
9
×
5
7
,
=
5
7
×(
7
9
+
2
9
),
=
5
7
×1,
=
5
7
;

(3)
3
4
×11+
3
4
,
=
3
4
×(11+1),
=
3
4
×12,
=9;

(4)46×
44
45
,
=(45+1)×
44
45
,
=45×
44
45
+1×
44
45
,
=44+
44
45
,
=44
44
45
.
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