(共13张PPT)
凑十歌
+
=
+
=
5
4
5
4
9
4
5
9
4
5
9
-
=
-
=
9
4
5
9
5
4
6+3=
9
3+6=
9-3=
9-6=
9
6
3
9
6
3
想
9-5=
5+4=
9
5
4
9
4
10
1
9
=
=
=
=
1
9
+
9
1
+
10
1
-
10
9
-
10
10
9
1
10
2
8
=
=
=
=
2
8
+
8
2
+
10
2
-
10
8
-
10
10
8
2
10
3
7
=
=
=
=
3
7
+
7
3
+
10
3
-
10
7
-
10
10
7
3
10
4
6
=
=
=
=
4
6
+
6
4
+
10
4
-
10
6
-
10
10
6
4
10
5
5
=
=
5
5
+
10
5
-
10
5
8
6
7
2
4
3
+
=
0
8
9
=
10-
10
10
10
10
2
1
4
3
2
=
6+
10
9
8
3
6
4
=
10-
7
4
6
+ =
+ =
- =
- =
5
8
3
8
3
5
5
3
3
5
8
8
10
1
9
1 + = 10
9
10 – 1 =
10 – = 1
9
9
10
2
8
+ = 10
– =
2
2
8
8
10
– =
2
8
10
3
3
3
3
7
7
7
7
10
10
4
4
4
4
6
6
6
6
10
10