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得数是
10
的加法和相应的减法
口算
3+6= 5+3= 6-2= 2+7=
8-3= 5+2= 9-5= 3+4=
8-4= 8-0= 6+2= 9-8=
9
5
4
8
7
8
4
4
8
9
7
1
+
1
+
9
=
10
10
-
1
=
9
9
+
1
=
10
10
-
9
=
1
+
2
+
8
=
10
10
-
2
=
8
8
+
2
=
10
10
-
8
=
2
+
3
+
7
=
10
10
-
3
=
7
7
+
3
=
10
10
-
7
=
3
+
4
+
6
=
10
10
-
4
=
6
6
+
4
=
10
10
-
6
=
4
+
5
+
5
=
10
10
-
5
=
5
+
4
+
6
=
10
10
-
4
=
6
6
+
4
=
10
10
-
6
=
4
+
3
+
7
=
10
10
-
3
=
7
7
+
3
=
10
10
-
7
=
3
+
2
+
8
=
10
10
-
2
=
8
8
+
2
=
10
10
-
8
=
2
+
1
+
9
=
10
10
-
1
=
9
9
+
1
=
10
10
-
9
=
1
+
0
+
10
=
10
10
-
0
=
10
10
+
0
=
10
10
-
10
=
0
+
0
+
10
=
10
10
-
0
=
10
10
+
0
=
10
10
-
10
=
0
0+10
=
10 10+0
=
10 10
-
0
=
10
10
-
10
=
0
1+9
=
10 9+1
=
10
10
-
1
=
9
10
-
9
=
1
2+8
=
10 8+2
=
10
10
-
2
=
8
10
-
8
=
2
3+7
=
10 7+3
=
10
10
-
3
=
7
10
-
7
=
3
4+6
=
10 6+4
=
10
10
-
4
=
6
10
-
6
=
4
5+5
=
10
10
-
5
=
5
0+10
=
10
10+0
=
10
10
-
0
=
10
10
-
10
=
0
1+9
=
10
9+1
=
10
10
-
1
=
9
10
-
9
=
1
2+8
=
10
8+2
=
10
10
-
2
=
8
10
-
8
=
2
3+7
=
10
7+3
=
10
10
-
3
=
7
10
-
7
=
3
4+6
=
10
6+4
=
10
10
-
4
=
6
10
-
6
=
4
5+5
=
10
10
-
5
=
5
0+10
=
10
10+0
=
10
10
-
0
=
10
10
-
10
=
0
1+9
=
10
9+1
=
10
10
-
1
=
9
10
-
9
=
1
2+8
=
10
8+2
=
10
10
-
2
=
8
10
-
8
=
2
3+7
=
10
7+3
=
10
10
-
3
=
7
10
-
7
=
3
4+6
=
10
6+4
=
10
10
-
4
=
6
10
-
6
=
4
5+5
=
10
10
-
5
=
5
10
-
0
=
10
10
-
4
=
6
10
-
3
=
7
10
-
5
=
5
10
-
1
=
9
10
-
9
=
1
10
-
6
=
4
10
-
7
=
3
10
-
8
=
2
10
-
2
=
8
8
10
7
10
6
10
5
10
10
4
6
3
7
8
2
9
1
10
10
10
玩游戏
——
摘苹果
=
+
10
-
10
=
☆
+☆=8
☆
+□=10
那么☆
=
( ),
□=
( )。
4
6
谢谢指导!
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