试题:
计算:2-1
2
3
=______,2.25÷
3
4
=______,
1
3
+
1
6
=______,1
2
5
×0.5=______.

答案:

我来补答
(1)2-1
2
3
=1
3
3
-1
2
3
=
1
3

(2)2.25÷
3
4
=2.25×
4
3
=3,
(3)
1
3
+
1
6
=
2
6
+
1
6
=
1
2

(4)1
2
5
×0.5=
7
5
×
1
2
=
7
10

故答案为:
1
3
,3,
1
2
7
10
 
 
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