(共19张PPT)
减法练习
1.使同学们经历与同伴交流10以内减法的算法过程,会用适合于自己的算法正确计算10以内减法。
2.初步体会生活中许多问题可用减法计算,进一步理解减法的含义,感受与同伴交流想法的乐趣。
3.培养同学们积极思考、认真倾听他人想法的习惯,培养动手操作和语言表达能力,提高同学们参与数学活动的意识和兴趣。
2
3
1
1
4
3
3
3
6
5
2
3
1 + 2=
5 – 3=
3 – 2=
2 + 2=
5 – 4=
4 + 2=
6 – 3=
5 – 2=
3
1
2
6
1
3
4
3
1 + 2=
5 – 3=
3 – 2=
2 + 2=
5 – 4=
4 + 2=
6 – 3=
5 – 2=
3
1
2
6
1
3
4
3
5 – 1 = 4
5 – 1 = 4
5 – 2 = 3
5 – 1 = 4
5 – 2 = 3
5 – 3 = 2
5 – 1 = 4
5 – 2 = 3
5 – 3 = 2
5 – 4 = 1
6 – 1 = 5
6 – 1 = 5
6 – 2 = 4
6 – 1 = 5
6 – 2 = 4
6 – 3 = 3
6 – 1 = 5
6 – 2 = 4
6 – 3 = 3
6 – 4 = 2
6 – 1 = 5
6 – 2 = 4
6 – 3 = 3
6 – 5 = 1
6 – 4 = 1
树上还有几个桃子?
9 – 4 = ?
小猴子摘走了几个桃子?
9 – 5 =
4
花上还有几只蝴蝶?
8 – 5 =
3
岸上还有几只?
2 – 2 =
0
减法练习
7 – 2 =
8 – 5 =
8 – 6 =
9 – 3 =
8 – 1 =
10 – 6 =
5
3
6
7
4
2
想一想,生活中哪些地方用到了减法?