1、,第 8 课时 整理与复习(2),第 四 单元 1120各数的认识,我拨12。,12,拨一拨、说一说。,12前面一个数是( ),后面的一个数是( )。,在15和19中间的数有( )个,它们是( )。,11,13,3,16 17 18,广场上有20个小朋友站成一队,从左边开始编号。,1,2,3,4,5,6,7,8,9,10,11,13,12,14,15,16,17,18,19,20,(1)从右边数,第8个小朋友是( )号。,(2)从右边数,第17个小朋友是( )号。,(3)站在队列中间的两个小朋友是( )号和( )号。,13,4,10,11,9,9,他们是几号?,(1),10 11 13 17
2、18,12,14,15,16,20,19,(2),20,18,16,10,8,6,0,14,12,4,2,想一想,填合适的数。,1,3,5,( )2,4,6,( )3,6,9,( ),20,18( )14( )( ),0,4,8,( ),7,8,12,12,16,12,10,+2,+2,+3,+4,-2,找规律填空。,7+1017 163+12 1311+3 3+710 1213-2 1418-5,=,=,17,15,14,10,11,13,在 里填“”“”或“”。,7岁 2岁 12岁 20岁 15岁,7,2,12,15,20,按年龄大小排一排。,11,15,17,20,16,12,19,14
3、,18,小到大: ,11,12,14,15,16,17,18,19,20,20,19,18,17,16,15,14,12,11,从小到大排一排,从大到小排一排。,10-9,9-6,3+5,1+9, ,1,8,10,3,10-9,9-6,3+5,1+9,按得数大小,把算式按从小到大顺序排列。,10+7=17 7+10=17 17-7=10 17-10=7,( )个十和( )个一组成17。,1,7,说一说。,用14,4,10三个数字,列四个算式。,+ = ,+ = , - = , - = ,10,4,14,4,10,14,14,10,4,14,4,10,+ = ,+ = , - = , - = ,11,5,16,5,11,16,16,11,5,16,5,11,在11,5,20,16四个数中选三个数字,列四个算式。,总结,