直接写得数.57-37=13-15=512+16=35+110=1-12-14=1712-16-56=89-13=49+79=-数学

题文

直接写得数.
5
7
-
3
7
=
1
3
-
1
5
=
5
12
+
1
6
=
3
5
+
1
10
=
1-
1
2
-
1
4
=
17
12
-
1
6
-
5
6
=
8
9
-
1
3
=
4
9
+
7
9
=
题型:解答题  难度:中档

答案

5
7
-
3
7
=
2
7
1
3
-
1
5
=
2
15
5
12
+
1
6
=
7
12
3
5
+
1
10