10的加减法课件.ppt

10的加减法课件.ppt第五单元:6~10的认识和加减法
10的加减法
开县白鹤街道东华中心小学田立孝
一、复习铺垫,激活经验
7+2=
7+2=
5+2=
4+3=
5+4=
3+5=
4+4=
5+1=
0+9=
9
7
9
7
8
8
9
6
2+6=
2+4=
8
6
一、复习铺垫,激活经验
3
7
10
5
5
10
3
6
9
10
9
1
10
2
8
3+6=9
6+3=9
9-3=6
9-6=3
二、激发兴趣,探究新知
9
1
10
1 + 9 = 10
9 + 1 = 10
10 – 9 = 1
10 – 1 = 9
10
10
10
10
10
9
9
9
9
9
1
1
1
1
1
二、激发兴趣,探究新知
8
7
2
10
3
10
10
8
8
8
10 – 2 =
2 + =
10 –=
2
10
7
7
7
10 – 3 =
3 + =
10 –=
3
二、激发兴趣,探究新知
6
10
10
4
6
5 + 5 =
10 – 5 =
10
5
4
10
4 + 6 =
10 –=
10 –=
4
6
5
5
加法
1 + 9 = 10
2 + 8 = 10
3 + 7 = 10
4 + 6 = 10
5 + 5 = 10
6 + 4 = 10
7 + 3 = 10
8 + 2 = 10
9 + 1 = 10
减法
10 – 1 = 9
10 – 2 = 8
10 – 3 = 7
10 – 4 = 6
10 – 5 = 5
10 – 6 = 4
10 – 7 = 3
10 – 8 = 2
10 – 9 = 1
三、算式排序,观察规律
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三、算式排序,观察规律
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
四、实践应用,内化提升
2.
+
=
8
6
7
2
4
3
10
10
10
10
=
-
0
8
9
10
2
1
四、实践应用,内化提升