内容正文:
苏教版二年级上册
第一单元·100以内的加法和减法(三)
www.youyi100.com
www.youyi100.com
www.youyi100.com
www.youyi100.com
www.youyi100.com
www.youyi100.com
www.youyi100.com
www.youyi100.com
www.youyi100.com
解决问题(1)
www.youyi100.com
www.youyi100.com
www.youyi100.com
www.youyi100.com
www.youyi100.com
www.youyi100.com
www.youyi100.com
www.youyi100.com
www.youyi100.com
情境导入
他们在做什么?
www.youyi100.com
www.youyi100.com
www.youyi100.com
www.youyi100.com
www.youyi100.com
www.youyi100.com
www.youyi100.com
www.youyi100.com
www.youyi100.com
新知探究
我穿了8个彩珠。
我穿了12个彩珠。
要让两串彩珠同样多,你有什么办法?
先用圆片摆一摆,再和同学交流。
www.youyi100.com
www.youyi100.com
www.youyi100.com
www.youyi100.com
www.youyi100.com
www.youyi100.com
www.youyi100.com
www.youyi100.com
www.youyi100.com
新知探究
8个
4个
8个
4个
1.小军再穿4个彩珠。
www.youyi100.com
www.youyi100.com
www.youyi100.com
www.youyi100.com
www.youyi100.com
www.youyi100.com
www.youyi100.com
www.youyi100.com
www.youyi100.com
新知探究
8个
8个
4个
2.把芳芳穿的彩珠拿走4个。
www.youyi100.com
www.youyi100.com
www.youyi100.com
www.youyi100.com
www.youyi100.com
www.youyi100.com
www.youyi100.com
www.youyi100.com
www.youyi100.com
新知探究
8个
2个
8个
4个
2个
3.拿出芳芳穿的2个彩珠给小军。
www.youyi100.com
www.youyi100.com
www.youyi100.com
www.youyi100.com
www.youyi100.com
www.youyi100.com
www.youyi100.com
www.youyi100.com
www.youyi100.com
新知探究
回顾解决问题的过程,你有什么体会?
动手操作可以帮助我们解决问题。
同一个问题,可以用不同的方法解决。
www.youyi100.com
www.youyi100.com
www.youyi100.com
www.youyi100.com
www.youyi100.com
www.youyi100.com
www.youyi100.com
www.youyi100.com
www.youyi100.com
想想做做
第一行摆15根小棒,
先用小棒摆一摆,再填空。
第二行摆9根。
1.
www.youyi100.com
www.youyi100.com
www.youyi100.com
www.youyi100.com
www.youyi100.com
www.youyi100.com
www.youyi100.com
www.youyi100.com
www.youyi100.com
想想做做
(1)第一行拿走( )根小棒,就和第二行同样多。
第二行9根
9根
6根
第一行15根
6
9根
www.youyi100.com
www.youyi100.com
www.youyi100.com
www.youyi100.com
www.youyi100.com
www.youyi100.com
www.youyi100.com
www.youyi100.com
www.youyi100.com
想想做做
(2)第二行添上( )根小棒,就和第一行同样多。
9根
9根
6根
6
6根
www.youyi100.com
www.youyi100.com
www.youyi100.com
www.youyi100.com
w