问题 解答题
计算:
(1)
-
45
2
20

(2)
0.01×81
0.25×144

(3)
1
2
3
÷
2
1
3
×
1
2
5

(4)
3a
2b
•(
b
a
÷2
1
b
)
答案

(1)原式=

-3
5
4
5
=-
3
4

(2)原式=

81
25×144
=
9
5×12
=
3
20

(3)原式=

5
3
3
7
7
5
=1;

(4)原式=

3a
2b
b
a
b
4
=
3
4

判断题
问答题