问题 解答题
下面各题能简算的要简算.
 48×(
7
12
+
1
3
2
3

23-
8
9
×
3
4
÷
1
27

5÷[(
2
3
+
1
5
1
13
]
答案

(1)48×(

7
12
+
1
3
)÷
2
3

=48×(

7
12
+
1
3
)×
3
2

=48×

7
12
×
3
2
+48×
1
3
×
3
2

=42+24,

=66;

(2)23-

8
9
×
3
4
÷
1
27

=23-

8
9
×
3
4
×27,

=23-18,

=5;

(3)5÷[(

2
3
+
1
5
)×
1
13
],

=5÷[

13
15
×
1
13
],

=5÷

1
15

=5×15,

=75.

填空题
单项选择题 A1/A2型题