问题 解答题
直接写出得数.
1.3+0.07=
3-
5
8
=
1
5
+
1
4
=
1
5
+
2
5
)-
2
7
=
3
4
+
2
5
=
4
5
-
1
2
=
1
3
+
1
4
=
10.8-3.9-4.1=
答案

①1.3+0.07=1.37,②3-

5
8
=2
3
8
,③
1
5
+
1
4
=
9
20
,④(
1
5
+
2
5
-
2
7
=
11
35
,⑤
3
4
+
2
5
=1
3
20

4
5
-
1
2
=
3
10
,⑦
1
3
+
1
4
=
7
12
,⑧10.8-3.9-4.1=2.8,

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