凑十法全部练习题
9
+
9
=
9
+
8
=
9 +
7
=
9
+
6
=
9
+
5
=
9
+
4
=
9
+
3
=
9
+
2
=
8
+
9
=
8
+
8
=
8
+
7
=
8
+
6
=
8
+
5
=
8
+
4
=
8
+
3
=
7
+
9
=
7
+
8
=
7
+
7
=
7
+
6
=
7
+
5
=
7
+
4
=
6
+
9
=
6
+
8
=
6
+
7
=
6
+
6
=
6
+
5
=
5
+
9
=
凑十法全部练习题
5
+
8
=
5
+
7
=
5
+
6
=
4
+
9
=
4
+
8
=
4
+
7
=
3
+
9
=
3
+
8
=
2
+
9
=
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