小学一年级10以内加减法口算题卡口算题卡（81）日期：用时：分秒得分:8 - 2 = 10 - 5 = 2 + 6 = 10 - 4 = 9 - 3 = 2 + 7 = 3 + 5 = 9 - 7 = 8 + 2 = 10 - 5 = 10 - 6 = 8 - 4 = 3 + 4 = 8 - 6 = 6 + 2 =4 - 2 = 4 + 2 = 10 - 3 = 6 + 2 = 2 + 4 =5 - 3 = 7 - 5 = 3 +6 = 9 - 5 = 3 + 6 = 3 + 4 = 8 - 2 = 10 - 6 = 2 + 8 = 2 +7 = 9 - 3 = 7 + 2 =8 - 5 = 4 + 5 = 8 - 2 = 2 + 5 = 3 + 6 = 3 + 7 = 10 - 2 = 7 - 4 = 8 - 4 = 10 - 5 =9 - 2 = 6 - 3 = 4 + 5 = 6 + 4 = 5 + 3 = 6 - 4 = 4 + 3 = 3 + 7 =口算题卡（82）日期：用时：分秒得分:7 - 3 = 7 - 2 = 5 + 5 = 5 - 2 = 6 - 2 = 9 - 4 = 2 + 6 = 10 - 7 = 7 - 5 = 5 - 3 = 7 + 3 = 10 - 8 = 8 - 3 = 4 + 4 = 2 + 6 =4 + 2 = 9 -5 =6 + 3 = 8 - 6 = 10 - 6 =5 - 3 = 4 +6 = 9 -7 = 10 - 4 =8 - 3 = 3 + 5 = 6 - 2 = 3 + 3 = 6 + 2 = 6 + 4 = 10 - 3 = 5 + 2 = 4 - 2 =9 - 6 = 9 - 6 = 8 + 2 = 7 - 4 = 5 + 4 = 2 + 7 = 5 + 3 = 6 + 3 = 8 - 3 = 2 + 7 = 4 + 4 = 9 - 4 =口算题卡（83）日期：用时：分秒得分:9 - 3 = 4 + 3 = 6 + 4 = 3 + 2 = 9 - 2 = 4 + 5 = 5 + 5 = 10 - 2 = 9 - 7 = 2 + 5 = 10 - 5 = 7 - 4 = 2 + 4 = 3 + 7 = 9 - 5 = 7 - 3 = 3 + 5 = 8 - 4 = 9 - 5 = 5 + 5 = 2 + 8 = 9 - 6 = 7 + 2 = 3 + 3 = 9 - 7 = 9 - 2 = 2 + 2 = 3 + 4 = 10 - 7 = 6 - 4 = 5 + 3 = 7 + 3 = 7 - 2 = 2 + 6 = 3 + 5 = 8 - 6 = 5 + 2 = 6 - 4 = 4 + 2 = 4 + 2 = 4 + 6 = 10 - 8 = 5 + 4 = 10 - 3 = 7 - 5 = 9 - 4 = 2 + 3 = 7 - 5 = 8 - 2 = 2 + 8 =口算题卡（84）日期：用时：分秒得分:2 + 5 = 6 + 2 = 10 - 4 = 8 + 2 = 10 - 4 = 5 - 5 = 2 + 8 =3 + 6 = 10 - 3 = 3 +4 = 3 + 3 = 7 - 4 = 6 - 3 = 6 + 4 = 10 - 2 = 6 - 4 = 10 - 8 = 8 - 6 = 2 + 7 = 8 + 2 = 9 - 7 = 4 + 4 =5 + 3 = 9 -6 = 8 - 4 = 8 + 2 = 8 - 5 = 10 - 4 =7 + 3 = 3 + 3 =8 - 4 =9 - 3 = 5 + 5 = 4 - 2 = 7 - 2 = 5 - 2 = 6 + 3 = 7 - 2 = 9 - 5 = 6 + 3 = 7 + 2 = 10 - 7 = 4 + 6 = 6 + 2 = 10 - 7 = 9 - 4 = 3 + 5 = 6 - 2 = 10 - 5 = 7 + 2 =口算题卡（85）日期：用时：分秒得分:7 + 4= 9 + 3= 5 + 9= 5 + 8= 5 + 7=5 + 8= 7 + 6= 9 + 6= 8 + 8= 9 + 4=6 + 7=7 + 8= 6 + 8= 9 + 7= 5 + 7= 4 + 8= 9 + 6= 7 + 5= 3 + 8= 7 + 8= 9 + 5=8 + 5= 5 + 3= 6 + 8= 3 + 16= 7 + 7= 5 + 7= 15-8= 8 + 6= 4 + 6= 10 + 4=9 + 4= 4 + 9= 8 + 7= 17-9= 2 + 8= 5 + 7= 14 + 6= 9 + 3= 17-6= 9 + 9= 9 + 8= 9 + 2= 6 + 7= 7 + 8= 13 + 7= 6 + 6= 18 + 2= 9 + 5= 15-5=口算题卡（86）日期：用时：分秒得分:9 + 8= 17 + 2= 7 + 6= 6 + 5= 15-9= 7 + 14= 1 + 19= 5 + 7= 9 + 3= 17-3= 12 + 8= 1 + 14= 2 + 13= 7 + 8= 6-5=6 + 9= 9 + 2= 8 + 5= 9 + 8= 15-2= 9 + 9= 8 + 6= 15 + 4= 8 + 8= 6 + 8= 12 + 5= 10 + 9= 12 + 3= 3 + 9= 6-5=5 + 6= 9 + 3=6 + 5= 6 + 9= 3 + 4= 5 + 5=7 + 6= 15 + 2=8 + 6= 3 + 3= 10 + 4= 7 + 9= 2 + 8= 7 + 5= 2 + 3= 7 + 2= 3 + 16= 5 + 10=9 + 4= 6-4=口算题卡（87）日期：用时：分秒得分:6 + 9= 4 + 6= 14 + 4= 4 + 7= 7-2= 9 + 5= 3 + 8= 4 + 9= 5 + 6= 2 + 3= 14 + 5= 13 + 6= 18 + 1=7 + 6= 5-1= 6 + 7= 9 + 6= 9 + 7= 5 + 8= 3 + 4= 4 + 6= 15 + 2= 6 + 8= 11 + 7= 7-4= 6 + 9= 9 + 3= 2 + 9= 5 + 8= 6-5= 9 + 5= 4 + 8= 9 + 9=8 + 8= 7 + 0=9 + 8= 7 + 8= 7 + 4= 9 + 7= 6-4= 6 + 8= 9 + 6= 5 + 5= 6 + 8= 4-4= 4 + 6= 3 + 9= 6 + 8= 6 + 8= 3 + 5=口算题卡（88）日期：用时：分秒得分:3 + 7= 7 + 7= 3 + 9= 5 + 7= 6 + 3=6 + 9= 9 + 5= 8 + 2= 8 + 4= 4 + 3=7 + 9= 5 + 8= 2 + 8= 7 + 4= 7-2= 9 + 8= 4 + 6= 4 + 7= 8 + 5= 3 + 3= 9 + 3= 8 + 3= 7 + 9= 4 + 7= 10-9= 8 + 8= 4 + 9= 8 + 5= 4 + 9= 8-4= 8 + 5= 5 + 5= 6 + 7= 8 + 7= 3 + 7= 4 + 7= 9 + 7= 2 + 9= 9 + 3= 4 + 4= 6 + 9= 6 + 8= 3 + 7= 9 + 2= 9-3= 9 + 9= 6 + 5= 6 + 6= 9 + 5= 1 + 9=口算题卡（89）日期：用时：分秒得分:8 + 4= 5 + 3= 4 + 9= 6 + 5= 7 + 2= 5 + 6= 7 + 6= 7 + 9= 8 + 5= 6 + 9= 5 + 5= 9 + 6= 5 + 8= 5 + 7= 9 + 5= 5 + 9= 5 + 8= 4 + 8= 9 + 4= 14-9= 7 + 2= 8 + 5= 6 + 6= 5 + 7= 4 + 8= 6 + 9= 9 + 3= 7 + 7= 5 + 8= 9 + 5= 9 + 5= 6 + 7= 8 + 4= 8 + 8= 8 + 8= 8 + 6= 7 + 8= 6 + 9= 9 + 7= 19-8= 6 + 7= 9 + 6= 5 + 8= 6 + 8= 7 + 14= 4 + 6= 7 + 5= 4 + 9= 9 + 8= 5 + 9=口算题卡（90）日期：用时：分秒得分:19-2= 15-8= 19-2= 9 + 2= 13-7= 18-6= 9 + 3= 18-6= 9 + 5= 6 + 7= 12-9= 17-5= 9 + 7= 15-8= 4 + 6= 9 + 3= 17-9= 6 + 8= 11-7= 7 + 4= 17-6= 1 + 19= 12 + 2= 5 + 8= 5 + 8= 13-8= 15-8= 13-6= 7 + 7= 9 + 4= 13-6= 9 + 4= 8 + 7= 10 + 4= 4 + 7= 9 + 6= 14-6= 9-3= 2 + 8= 5 + 6=7 + 8= 2 + 13= 7 + 8= 12-8= 7 + 6=8 + 5= 2 + 8= 7 + 5= 10 + 4= 6 + 8=口算题卡（91）日期：用时：分秒得分:15-10= 8 + 8= 6 + 4= 10-6= 7 + 5= 14-4= 3 + 9= 10-3= 4 + 5= 13 + 6= 4 + 9= 6 + 9= 4 + 4= 8 + 2= 6 + 5= 18-1= 8 + 6= 5 + 2= 10-1= 3 + 3= 6 + 5= 9 + 7= 9-3= 7 + 3= 6 + 9= 5 + 3= 3 + 5= 2 + 2= 10-2= 9 + 9= 1 + 14= 4 + 6= 2 + 8= 5 + 5= 12-9=7 + 6= 10-7= 10-5= 10-4= 5 + 6= 19-7= 9 + 1= 1 + 9= 3 + 7= 9 + 5= 9 + 8= 2 + 4= 10-8= 6 + 2= 6 + 7=口算题卡（92）日期：用时：分秒得分:2 + 4 = 9 - 2 = 2 + 5 = 7 -3 = 5 - 2 = 7 - 5 =4 +5 = 10 - 2 = 2 +6 = 8 - 6 = 3 +7 =8 - 2 = 5 + 2 = 3 + 4 = 5 + 2 = 10 - 6 = 4 + 3 = 8 - 3 = 5 + 4 = 7 - 3 =9 + 3 = 4 + 8 = 7 + 8 = 4 + 9 = 6 + 7 =10 - 2 = 6 - 2 = 9 - 3 = 9 - 5 = 8 - 7 = 8 + 1 = 8 - 3 = 9 - 5 = 4 + 8 = 7 - 6 = 4 + 6 = 9 + 9 = 8 + 7 = 4 + 7 = 6 + 3 = 8 + 2 = 4 + 7 = 3 + 9 = 12 - 8 = 5 + 8 = 6 + 8 = 9 + 7 = 7 + 8 = 9 + 8 = 8 - 5 =口算题卡（93）日期：用时：分秒得分:7 + 9 = 8 + 8 = 5 + 8 = 14 – 9 = 17 – 6 = 4 + 7 = 9 + 4 = 6 + 8 = 8 + 9 = 15 – 6 = 9 + 8 = 4 + 6 = 5 + 3 = 6 + 8 = 17 – 5 = 3 + 7 = 6 + 8 = 9 + 6 = 2 + 8 = 6 + 9 = 14 – 6 = 5 + 7 = 4 + 7 = 7 + 9 = 15 – 8 = 6 + 9 = 8 + 4 = 9 + 8 = 8 + 5 = 9 + 11 = 16 - 7 = 13 - 7 = 7 + 4 = 8 + 3 = 17 - 6 = 19 - 8 = 8 + 5 = 9 + 5 = 8 + 6 = 7 + 14 = 8 + 2 = 4 + 7 = 3 + 9 = 12 - 8 = 5 + 83 + 5 = 13 - 6 = 6 + 9 = 9 + 5 = 13 - 8 =口算题卡（94）日期：用时：分秒得分:11 - 9 = 14 - 8 = 9 + 7 = 10 + 2 = 8 + 7 =12 - 9 = 9 - 3 = 8 + 3 = 5 + 6 = 5 + 7 =6 + 8 = 9 + 2 =7 + 4 = 4 + 9 = 5 + 5 = 10 + 6 = 9 + 5 = 10 + 4 =8 + 5 = 6 + 10 = 14 – 6 = 7 + 2 = 6 + 5 =9 + 6 = 6 + 8 =8 + 5 = 3 + 6 = 7 + 9 = 8 + 5 = 5 + 7 =6 + 8 = 4 +7 = 9 + 4 = 5 + 9 = 7 +8 =6 + 5 = 4 + 9 =7 + 7 = 5 + 7 =8 + 4 =5 + 3 = 2 + 7 = 7 + 4 =6 + 4 = 3 + 6 = 17 + 1 = 15 -8 = 16 + 3 = 5 + 6 = 5 - 4 =口算题卡（95）日期：用时：分秒得分:9 + 2 = 8 + 4 = 7 + 5 = 5 + 8 = 6 + 6 =15 - 9 = 14 - 8 = 12 - 7 = 13 - 5 = 11 - 6 =9 + 4 = 7 + 8 = 11 + 8 = 5 + 7 = 6 + 5 =12 - 9 = 16 - 8 = 15 - 7 = 11 - 5 = 14 - 6 =9 + 6 = 8 + 8 = 7 + 6 = 5 + 8 = 6 + 8 =16 - 9 = 11 - 8 = 13 - 7 = 12 - 5 = 15 - 6 =9 + 8 = 5 + 8 = 7 + 4 = 5 + 9 = 6 + 9 =13 - 9 = 13 - 8 = 14 - 7 = 14 - 5 = 12 - 6 =6 +7 = 7 + 7 = 9 + 5 = 6 + 4 = 4 +8 =11 – 9 = 12 – 8 = 16 – 7 = 15 – 5 = 13 – 6 =口算题卡（96）日期：用时：分秒得分:14 – 9 = 15 – 8 = 17 – 10 = 12 – 3 = 11 – 4 = 11 – 3 = 12 – 4 = 13 – 4 = 11 – 2 = 14 – 10 = 4 + 8 = 5 + 7 = 2 + 9 = 8 + 6 = 7 + 5 =14 – 6 = 12 – 5 = 11 – 5 = 15 – 6 = 15 – 7 = 7 + 4 = 9 + 9 = 9 + 6 = 8 + 9 = 8 + 4 =11 – 5 = 12 – 6 = 14 – 9 = 15 – 8 = 16 – 9 = 4 + 7 = 6 + 6 = 8 + 8 = 7 + 7 = 9 + 3 =14 – 8 = 15 – 6 = 16 - 9 = 18 - 9 = 17 - 8 =9 + 9 = 7 + 5 = 8 + 5 = 13 - 8 = 5 + 9 =17 - 10 = 16 - 1 = 16 - 2 = 16 - 4 = 16 - 3 =口算题卡（97）日期：用时：分秒得分:1 + 11 = 1 + 12 = 1 + 13 = 1 + 15 = 1 + 14 = 20 - 10 = 19 - 1 = 19 - 2 = 19 - 4 = 19 - 3 = 18 -5 = 18 -6 = 18 -7 = 18 -9 = 18 - 8 = 17 - 5 = 17 - 6 = 17 - 7 = 17 - 9 = 17 - 8 = 6 - 2 = 6 - 3 = 6 - 4 = 6 - 6 = 6 - 5 = 16 - 10 = 15 - 1 = 15 - 2 = 15 - 4 = 15 - 3 = 2 + 7 = 2 + 8 = 2 + 9 = 2 + 11 = 2 + 10 = 15 - 10 = 14 - 1 = 14 - 2 = 14 - 4 = 14 - 3 = 1 + 16 = 1 + 17 = 1 + 18 = 2 + 0 = 1 + 19 = 19 - 5 = 19 - 6 = 19 - 7 = 19 - 9 = 19 - 8 =口算题卡（98）日期：用时：分秒得分:2 + 12 = 2 + 13 = 2 + 14 = 2 + 16 = 2 + 15 = 15 - 5 = 15 -6 = 15 -7 = 15 - 9 = 15 -8 = 18 - 10 = 17 - 1 = 17 - 2 = 17 - 4 = 17 - 3 = 2 + 17 = 2 + 18 = 3 + 3 = 3 + 5 = 3 + 4 = 19 - 10 = 18 - 1 = 18 - 2 = 18 - 4 = 18 - 3 = 3 + 16 = 3 + 17 = 4 + 4 = 4 + 6 = 4 + 5 = 13 - 5 = 13 - 6 = 13 - 7 = 13 - 9 = 13 - 8 = 4 + 7 = 8 - 6 = 4 + 9 = 4 + 11 = 4 + 10 = 13 - 10 = 12 - 1 = 12 - 2 = 12 - 5 = 12 - 4 = 4 + 12 = 4 + 13 = 4 + 14 = 4 + 16 = 4 + 15 =口算题卡（99）日期：用时：分秒得分:11 - 1 = 11 - 2 = 11 - 3 = 11 - 5 = 11 - 4 =13 - 6 = 18 - 9 = 11 - 7 = 6 + 9 = 12 + 8 =17 - 9 = 13 - 6 = 14 - 5 = 15 - 6 = 14 - 9 =12 - 9 = 12 + 8 = 11 - 9 = 4 + 8 = 11 - 6 =16 - 4 = 7 + 9 = 16 - 7 = 2 + 17 = 14 - 7 =12 - 8 = 17 - 8 = 18 - 1 = 17 - 8 = 8 + 8 =15 - 7 = 10 - 4 = 14 + 6 = 16 - 9 = 11 + 9 =15 + 5 = 16 - 8 = 7 + 5 = 14 - 4 = 14 - 10 =12 - 4 = 11 - 4 = 4 + 6 = 8 - 6 = 5 + 9 =4 + 16 = 4 + 13 = 17 - 7 = 2 + 18 = 7 + 8 =口算题卡（100）日期：用时：分秒得分:( )- 6 = 3 4 + ( )= 10 10 -( )= 3 3 + ( )= 9 6 -( )= 25 + ( )= 9 8 -( )= 2 2 + ( )= 9 ( )- 7 = 0 ( )-6 = 3 ( )- 3 = 0 2 + ( )= 6 ( )- 5 = 27 + ( )= 10 7 + ( )= 10 6 + ( )= 10 ( )- 7 = 38 -( )= 4 ( ) + 6 = 8 5 -( )= 3 ( )- 8 = 2 ( ) + 6 =9 ( ) + 4 = 7 7 -( )= 3 ( )- 3 = 12 + ( )= 7 9 -( )= 2 ( )- 8 = 0 ( )-3 = 2 10 -( )= 6 ( )- 6 = 2 6 + ( )= 10 9 -( )= 3 3 + ( )= 8 ( ) + 7 = 104 + ( )= 9 8 -( )= 3 2 + ( )=5 ( )-6 = 0 10 -( )= 2 ( )- 3 = 4 2 + ( )=7 ( )- 7 = 2 2 + ( )= 10 ( ) + 2 = 4 2 + ( )= 10 ( )- 5 = 38 -( )= 4 ( ) + 6 = 109 -( )= 3实用标准文案精彩文档。
数学教案8和9的加法数学教案8和9的加法数学教案8和9的加法篇一：《8、9的加减法》教学设计【教学内容】西师版教材一年级上册第35--36页中例1、例2及练习六的第1题。
【教材分析】有关8、9的加减法，与6、7的加减法相比较，在编排上有较大的区别：首先，从根据一幅图写出两个加法算式或两个减法算式过渡到根据一幅图写出四个算式。
教材提供一幅小棒图，在教师指导下让学生写出不同的算式，这样安排由学生自己去发现2、6、8三个数之间的关系，不仅让学生写出了四个算式，更重要的是让他们亲身经历了根据一幅图写出四个算式的探索过程，使学生感受到“一图四式”与实际生活的联系。
关于9的加、减法是在8的加减法基础上进行的，让学生通过摆一摆进一步强化一种摆法列出四个算式的方法，提高学生的计算能力。
【学情分析】学生已学习了8、9的认识。
学生在学习6、7的加减法时就会根据一副图列两个加法算式或两个减法算式，为本课的一图四式的学习打下了基础。
【教学目标】1、知识与技能：掌握得数是8和9的加法及8减几、9减几的减法的计算方法，并能正确地进行相应的口算。
2、过程与方法：让学生经历观察、交流、自主探究，实践操作等活动，在根据一幅图写出四道算式并算出得数的探索过程中，感受调换两个加数的位置得数一样的客观事实。
3、情感态度与价值观：以同桌合作学习的形式培养学生学习数学的兴趣和探索精神，感受学习数学的乐趣。
【教学重难点】1、教学重点：掌握得数是8和9的加法及8减几、9减几的减法的计算方法，并能正确地进行相应的口算。
2、教学难点：根据一幅图写出两道加法算式和两道减法算式（一图四式）。
【教学准备】挂图、小红花、圆片等。
一、复习铺垫，导入新课。
1、师谈话激趣：孩子们，在前面的数学旅途中老师带着大家去数学王国学习了好多的数学知识，今天我们就要用学到的知识去闯关，有没有信心挑战？2、闯关练习：（1）第一关：算一算，看谁算得又对又快。
出示卡片：6+14+27-16-43+22+24+36-3（2）第二关：填一填。
9以内加减法口算练习题一、加法练习题1. 5 + 3 =2. 7 + 1 =3. 2 + 6 =4. 4 + 3 =5. 9 + 0 =6. 2 + 4 =7. 8 + 1 =8. 3 + 6 =9. 5 + 2 =二、减法练习题1. 6 - 2 =2. 9 - 7 =3. 8 - 3 =4. 5 - 1 =5. 7 - 0 =6. 4 - 2 =7. 9 - 1 =8. 6 - 4 =9. 3 - 2 =三、混合运算练习题1. 2 + 3 - 1 =2. 5 - 2 + 1 =3. 8 - 3 + 4 =4. 6 + 2 - 4 =5. 7 + 3 - 2 =6. 9 - 5 + 1 =7. 4 - 1 + 3 =8. 3 + 2 - 1 =9. 1 + 4 - 3 =四、解答题1. 某篮球队有9名队员，其中有4名队员请假，还有几名队员可以参加比赛？2. 小明有7支铅笔，他给了朋友3支，还剩下几支铅笔？3. 在一场演出中，已经卖出了6张票，还剩下几张票未售出？4. 一箱饮料有12瓶，小红喝了5瓶，小明喝了3瓶，还剩下几瓶？5. 一个班级有15名学生，其中有8名学生参加了比赛，还有几名学生没有参加比赛？五、挑战题1. 9 + 4 - 6 =2. 7 - 2 + 9 =3. 4 + 6 - 5 =4. 8 - 3 + 7 =5. 6 + 9 - 8 =6. 3 - 2 + 1 =7. 5 + 8 - 7 =8. 2 - 1 + 5 =9. 1 + 7 - 3 =六、超级挑战题1. 8 + (5 - 2) =2. (9 - 1) + 3 =3. (7 + 2) - 4 =4. 6 - (3 - 1) =5. (4 + 0) - (2 - 1) =6. (9 - 4) + (6 - 5) =7. (2 + 3) - (1 - 4) =8. (8 - 5) + (2 - 1) =9. (7 - 3) - (6 - 2) =希望以上口算练习题能够帮助你巩固对9以内加减法的掌握。
10以内加减法口算题卡一、加法部分1. 1 + 1 = 2- 解析：1个物品再加上1个物品，总共就有2个物品。
2. 1+2 = 3- 解析：先有1个，再加上2个，1、2、3，一共是3个。
3. 2 + 2 = 4- 解析：2个和另外2个合起来，2个之后接着数2个，就是4个。
4. 1+3 = 4- 解析：1个加上3个，从1开始数3个数，1、2、3，得到4个。
5. 2+3 = 5- 解析：2个加上3个，先数2个，再接着数3个，总共是5个。
6. 1 + 4 = 5- 解析：1个和4个放在一起，从1开始往后数4个数，1、2、3、4，结果是5个。
7. 3+3 = 6- 解析：3个与另外3个相加，3个之后再数3个，3、4、5、6，一共6个。
8. 2+4 = 6- 解析：2个加上4个，从2开始数4个数，2、3、4、5、6，得到6个。
9. 1+5 = 6- 解析：1个和5个合起来，从1开始数5个数，1、2、3、4、5、6，结果是6个。
10. 3+4 = 7- 解析：3个加上4个，先数3个，再接着数4个，3、4、5、6、7，总共7个。
11. 2+5 = 7- 解析：2个加上5个，从2开始数5个数，2、3、4、5、6、7，得到7个。
12. 1+6 = 7- 解析：1个和6个放在一起，从1开始数6个数，1、2、3、4、5、6、7，结果是7个。
13. 4+4 = 8- 解析：4个与另外4个相加，4个之后再数4个，4、5、6、7、8，一共8个。
14. 3+5 = 8- 解析：3个加上5个，先数3个，再接着数5个，3、4、5、6、7、8，总共8个。
15. 2+6 = 8- 解析：2个加上6个，从2开始数6个数，2、3、4、5、6、7、8，得到8个。
16. 1+7 = 8结果是8个。
17. 5+4 = 9- 解析：5个加上4个，先数5个，再接着数4个，5、6、7、8、9，总共9个。
18. 3+6 = 9- 解析：3个加上6个，从3开始数6个数，3、4、5、6、7、8、9，得到9个。
