(共19张PPT)
9加几的进位加法
9个
5个
9+5=
?
填一填:
9+3=
9+8=
+
=
先算:
再算:
+
=
+
=
先算:
再算:
+
=
9
+
3
=
12
9
+
5
=
14
9
+
8
=
17
发现规律
9
+
4
=
13
9
+
3
=
12
9
+
2
=
11
9
+
5
=
14
9
+
9
=
18
9
+
7
=
16
9
+
8
=
17
9
+
6
=
15
9
+
1
=
10
9
+
4
=
13
9
+
3
=
12
9
+
2
=
11
9
+
5
=
14
9
+
9
=
18
9
+
7
=
16
9
+
8
=
17
9
+
6
=
15
9
+
1
=
10
9
+
4
=
13
9
+
3
=
12
9
+
2
=
11
9
+
5
=
14
9
+
9
=
18
9
+
7
=
16
9
+
8
=
17
9
+
6
=
15
9
+
1
=
10
9
+
4
=
13
9
+
3
=
12
9
+
2
=
11
9
+
5
=
14
9
+
9
=
18
9
+
7
=
16
9
+
8
=
17
9
+
6
=
15
发现规律
9
+
1
=
10
9
+
7=
9
+
9=
9
+
4=
9
+
8=
9
+
5=
9
+
3=
9
+
2=
7
+
9=
抢答
用你喜欢的方法算一算:
7+9=
+
=
先算:
再算:
+
=
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