北师版六加几.pptx

文档介绍：1
6 + 5 = □
4
10
□
1
11
6 + 6 = □
□
□
□
2
12
4
10
怎样想能很快说出得数?
2
6 + 7 = □
6 + 9 = □
6 + 8 = □
因为 7 + 6 = 13
所以 6 + 7 = 13
因为 9 + 6 = 15
所以 6 + 9 = 15
因为 8 + 6 = 14
所以 6 + 8 = 14
1.
=
=
2.
6 + 4 =
6 + 5 =
6 + 6 =
6 + 7 =
6 + 8 =
6 + 9 =
3.
7 + 6 =
8 + 6 =
9 + 6 =
6 + 7 =
6 + 8 =
6 + 9 =
6
+
5
11
6
+
7
13
10
11
12
13
14
15
13
13
14
14
15
15
做一做