问题 解答题
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
答案

(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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