问题 解答题
直接写出得数
1
4
+
2
4
=
1+
3
5
=
1
3
-
1
9
=
5
7
-
3
7
=
2-
1
3
=
2
3
+
1
6
=
2
5
-
1
3
=
1
5
+
1
4
=
3-
1
4
=
2+
1
6
=
1.5-
7
10
=
0.5+
1
4
=
2.5+
1
2
=
1
6
+0.5=
1
3
-0.25=
3
4
-0.7=
答案

1
4
+
2
4
=
3
4
1+
3
5
=1
3
5
1
3
-
1
9
=
2
9
5
7
-
3
7
=
2
7
2-
1
3
=1
2
3
2
3
+
1
6
=
5
6
2
5
-
1
3
=
1
15
1
5
+
1
4
=
9
20
3-
1
4
=2
3
4
2+
1
6
=2
1
6
1.5-
7
10
=
8
10
0.5+
1
4
=
3
4
2.5+
1
2
=3,
1
6
+0.5=
2
3
1
3
-0.25=
1
12
3
4
-0.7=
1
20

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