第1单元 第4课时 解决问题（2）（课件PPT）-【优翼·学练优】2022-2023学年二年级数学上册同步备课（苏教版）

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（2） 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 根据图中的条件，你能提出什么问题？ 新知探究 我比小英多做3朵。 我做了11朵花。 我比小英少做3朵。 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 谁做的花最多？谁做的最少？ 小华做了多少朵？ 小平做了多少朵？ 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 11朵 先用圆片摆一摆，再想想怎样解答。 （1）小华做了多少朵？ 小英 小华 11朵 多3朵 + 11 3 = 14 （） 朵 答：小华做了14朵。 根据解答的结果算一算，小华是不是比小英多做了3朵？ 先用圆片摆一摆，再解答。 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 11朵 （2）小平做了多少朵？ 小英 小平 少3朵 ？朵 － 11 3 = 8 （） 朵 答：小平做了8朵。 (1)在横线上画 ,比 多2个， 有( )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 想想做做 1.先画一画，再解答。 + 5 2 = 7 7 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)在横线上画 ,比 少2个， 有( )个。 1.先画一画，再解答。 － 5 2 = 3 3 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 19棵 比杨树多8棵 ？棵 杨树 松树 2.看图列式解答。 + 19 8 = 27 （） 棵 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