问题 填空题
计算:(1)
3
-
1
3
=______;(2)
3
×
1
3
=______;(3)
3
÷
1
3
=______.
答案

(1)

3
-
1
3
=
3
-
3
3
=
2
3
3

(2)

3
×
1
3
=
3
×
3
3
=1;

(3)

3
÷
1
3
=
3
÷
3
3
=
3
×
3
3
=3.

故答案为:

2
3
3
;1;3.

单项选择题
单项选择题