问题 解答题
计算下面各题.
(
3
4
+
7
9
)×36
1
4
+
2
3
×
1
2
13
15
×
3
7
×14
1
2
×(
5
6
-
2
3
)
5
7
+
2
7
×
1
2
2
3
×
3
4
-
2
3
×
1
4
答案

(1)(

3
4
+
7
9
)×36,

=

3
4
×36+
7
9
×36,

=27+28,

=55;

(2)

1
4
+
2
3
×
1
2

=

1
4
+
1
3

=

7
12

(3)

13
15
×
3
7
×14,

=

13
15
×(
3
7
×14),

=

13
15
×6,

=

26
5

(4)

1
2
×(
5
6
-
2
3
),

=

1
2
×
1
6

=

1
12

(5)

5
7
+
2
7
×
1
2

=

5
7
+
1
7

=

6
7

(6)

2
3
×
3
4
-
2
3
×
1
4

=

2
3
×(
3
4
-
1
4
),

=

2
3
×
1
2

=

1
3

解答题
单项选择题