1、20以内加减法口算练习题(难度指数★★★) 姓名:___ 时间:_____ 做对了_____题(共100题) 10+8= 10+2= 13+2= 8+3= 15-8= 8+10= 17-7= 19-3= 9+4= 17-3= 18-8= 10+8= 3+11= 7+5= 16-5= 18-10= 3+10= 16-4= 7+6= 14-7= 10+1= 10+2= 19-4= 7+3=
2、 10-3= 1+10= 10+10= 19-5= 6+7= 12-8= 11-1= 14-4= 15-3= 8+5= 11-2= 11-10= 18-8= 10+4= 5+6= 14-9= 6+10= 6+10= 13-3= 7+3= 14-2= 16-6= 10+9= 14-1= 3+10= 15-8= 16-10= 8+10= 10+
3、2= 11-5= 13-9= 10+3= 13-3= 13-3= 17-3= 12-4= 3+10= 5+10= 3+15= 19+1= 11-8= 13-3= 16-10= 18-8= 15-7= 10-4= 13-10= 11-10= 5+5= 13-4= 12-7= 10+5= 13-10= 4+6= 18-4= 18-9= 5+10= 18-10= 20-20
4、= 17-7= 19-11= 10+8= 10-10= 12+4= 14+5= 14-12= 3+10= 10+9= 8-8= 16-3= 16-13= 11-1= 10-5= 10+0= 20-7= 17-13= 20以内加减法练习题(难度指数★★★) 姓名:_______ 时间:_____ 做对了_____题(共100题) 9+1= 8+7= 8+4= 9+7= 9+7= 8+2= 7+9= 8+5= 6+6= 6+5=
5、 8+3= 7+5= 9+6= 4+9= 2+8= 2+9= 8+6= 6+8= 6+5= 7+7= 19-9= 8+8= 7+9= 5+8= 8+8= 9+3= 7+4= 8+10= 5+7= 4+8= 8+4= 8+5= 7+4= 8+7= 8+6= 5+9= 7+7= 5+7= 4+8= 7+6= 8+6= 6+5= 9+2= 8+6= 3+9= 4+9= 1+9= 7+8= 7+10= 5+9= 5+9= 7+3= 9+
6、8= 2+8= 3+8= 6+9= 6+7= 9+2= 10-9= 6+4= 7+9= 5+6= 8+3= 2+10= 7+2= 8+9= 8-5= 6+7= 9+8= 6+9= 9+0= 10-7= 8+4= 6+3= 6+8= 5+8= 6+7= 1+9= 10+4= 5+10= 8+9= 2+9= 10-5= 6+8= 13-3=
7、 9+9= 9+4= 9+5= 9+3= 3+8= 9+3= 5+9= 8+2= 7+4= 6+7= 3+8= 9+5= 9+3= 8+3= 5-4= 20以内加减法练习题(难度指数★★★★) 姓名:______ 时间:__ 做对了_____题(共100题) 8+9= 9+8= 7+6= 7+5= 6+2+7= 10+8= 8+5= 9+6= 6+9= 4+5+2= 5
8、+5= 9+5= 7+8= 9+5= 3+5+7= 4+6= 5+9= 6+7= 7+7= 4+4+6= 9+4= 8+4= 9+7= 9+4= 4+3+2= 7+4= 6+5= 8+6= 7+8= 4+6+5 = 8+4= 6+6= 6+8= 9+6= 7+2+4= 10-2= 7+7= 8+5= 8+3= 2+6+5= 2+9=
9、 9+7= 5+8= 7+4= 7+1+7= 7+5= 8+8= 8+4= 9+9= 6+3+4= 18-2= 9+2= 4+8= 8+4= 6+1+5= 10+5= 5+7= 9-4= 7+6= 5+2+4= 9+6= 9+5= 7+6= 9+4= 3+5+9= 8+4= 7+9= 6+7= 6+8= 6+4+1= 9+4= 8+10= 7+5
10、= 7+9= 3+6+5= 8+7= 6+10= 5+7= 9+8= 7+2+6= 9+2= 8+6= 4+7= 9+3= 4+4+9= 7+5= 19-7= 7+4= 8+4= 9+1+9= 7+9= 7+3= 9+3= 8+3= 8+2+2= 8+5= 2+8= 6+6= 6+6= 7+3+1= 20以内加减法练习题(难度指数★★★★★) 姓名
11、 时间:_____ 做对了_____题(共100题) 8+2+4= 8-2+6= 3+6+9= 4+5+8= 19-7+4= 7+3+2= 4+4-2= 2+6+5= 2+3+4= 17-9+11= 8+2+6= 6+2+7= 7+2-5= 6+3+8= 16-12+4= 7+3+4= 6+3+7= 9-2+7= 3+3+2= 12+3-8= 9+1+8= 5+4+7= 8-2+8= 2+2+4= 11-9+13= 8+2+5= 4
12、+5+8= 9-4+7= 4+8+7= 16+2-17= 5+4+9= 1+0+7= 8-2+7= 10+2+7= 17-13+10= 5+2+2= 9-6-1= 9-4+7= 12+6-5= 1+9-3= 3+6+4= 5+4+6= 6+2+9= 7-7+5= 12+9-3= 5+2+7= 5+1+7= 8-2+3= 8+2+7= 18-9+2= 7-3+6= 2+3+9= 9-4+6= 8-3+7= 13+3-6= 7-2+7=
13、 7+2+6= 4+3+5= 5+2+3= 12-6+8= 4+2-3= 9+1+5= 6+2-3= 6+2+2= 12-3+4= 6+3+4= 7+3+2= 3+9+6= 3+3+1= 10-3+9= 4+2+5= 10+8-4= 10-5+4= 2+3+5= 12-9+3= 7+2+7= 7-2+9= 3+4+6= 3-0+7= 17-4+8= 8+1+2= 6+2+7= 9-6+4= 5-5+5= 18-9-4=
14、 1+8+5= 8+2+7= 4+5+8= 7-3+4= 20-3-13= 6+3+9= 6-3+9= 7+5-7= 6+2-6= 13-8+4= 10-1+2= 5+1+7= 10-4-0= 8-7+6= 3+4+8= 20以内的加减法 (难度指数★) 姓名:________ 时间:_____ 做对了_____题(共40题) 9+2= 3+8= 11-5= 16-8= 12-4= 6+5= 13-5= 3+9= 4+7= 9+9= 18-9= 15-4=
15、17-7= 5+7= 7+7= 11-2= 11-3= 15-7= 12-6= 4+8= 6+8= 14-8= 9+6= 12+3= 11-4= 5+8= 2+9= 16-8= 15-8= 6+10= 15-3= 6+7= 9+8= 3+9= 15-6= 14-9= 8+7= 16-7= 5+6= 19-9= 20以内的加减法(难度指数★) 姓名:________ 时间:_____ 做对了_____题(共40题) 13-7= 14-9= 9+5= 12-8= 15-7= 8+9= 15-9= 10+
16、6= 7+8= 8+3= 7+5= 17-8= 9+4= 13-9= 7+6= 12-9= 9+6= 8+5= 16-8= 7+4= 8+6= 10+5= 9+9= 14-7= 18-8= 14-9= 18-9= 8+8= 3+9= 11-7= 14-2= 6+7= 11-3= 5+6= 15-8= 6+6= 11-2= 16-9= 4+8= 16-8= 20以内的加减法(难度指数★) 姓名:________ 时间:_____ 做对了_____题(共40题) 15-7= 13-7= 12-8=
17、 7+4= 16-7= 15-8= 13-9= 11-7= 8+5= 10+3= 9+3= 14-7= 7+8= 13-8= 9+5= 16-9= 9+4= 5+8= 17-8= 9+6= 8+6= 14-8= 17-7= 12-3= 15-8= 13-4= 18-4= 12+3= 16-8= 6+6= 15-9= 7+5= 6+5= 12-4= 6+7= 16-8= 15-6= 12-6= 14-5= 18-9= 20以内的加减法 (难度指数★) 姓名:_______
18、 时间:_____ 做对了_____题(共40题) 9+3= 12-5= 4+9= 6+7= 3+8= 17-7= 12-10= 7+6= 10+6= 16-7= 9+6= 8+5= 8+7= 4+13= 11-1= 13-4= 11-2= 12-7= 17-9= 6+6= 5+6= 9+8= 15-9= 7+7= 6+8= 13+6= 8+4= 16-2= 8+8= 7+9= 10+2= 11-6= 6+5= 4+7= 13-8= 11-9= 14-6= 3+9= 12-8= 15-7= 2
19、0以内加减法练习(难度指数★★) 姓名:________ 时间:_____ 做对了_____题(共60题) 18- 5 = 17-11 = 13+ 6 = 17- 5 = 18-3= 16-10 = 5 - 4 = 9 - 4 = 16- 1 = 17-6= 7 +10 = 9 - 0 = 18+ 1 = 6 +10 = 13-9= 4 - 0 = 18-12 = 17-17 = 10+ 2 = 17-10= 10-10 = 9 - 0 = 15- 0 = 4 + 1 = 19-16= 0 +
20、16 = 2 + 2 = 13-12 = 4 +12 = 15-12= 13+ 4 = 6 - 5 = 15-13 = 14+ 1 = 14-11= 3 +12 = 0 + 0 = 0 +17 = 7 - 2 = 17-13= 2 +14 = 11-10 = 11+ 4 = 10+ 4 = 16-12= 14- 3 = 11- 1 = 3 - 1 = 13- 2 = 13-9= 12- 0 = 11+ 0 = 13-10 = 15+ 4 = 15-9= 3 + 5 = 10+ 7 =
21、 0 + 1 = 19-14 = 13-8= 20以内加减法练习(难度指数★★) 姓名:________ 时间:_____ 做对了_____题(共60题) 3 + 4 = 1 +14 = 14+ 2 = 4 +12 = 12-9= 12+ 5 = 14+ 1 = 10+ 8 = 17-15 = 12-3= 15- 3 = 9 - 8 = 11+ 5 = 16+ 1 = 17-11= 12+ 3 = 17-12 = 1 +17 = 11+ 5 =
22、 15-8= 2 + 6 = 19- 5 = 7 - 3 = 12+ 4 = 14-9= 10+ 7 = 1 +12 = 11+ 1 = 17-10 = 13-8= 9 - 9 = 4 +12 = 11+ 2 = 13+ 2 = 4-2= 16- 1 = 19-13 = 4 - 3 = 1 +14 = 5-3= 15- 3 = 6 - 5 = 13+ 1 = 11+ 1 = 3-0= 19- 1 = 2 + 6 = 19-18 = 2 +11 =
23、 14-8= 2 + 6 = 18-13 = 12+ 7 = 3 + 1 = 17-8= 3 + 4 = 16-14 = 18- 2 = 5 + 4 = 13-9= 20以内加减法练习(难度指数★★) 姓名:________ 时间:_____ 做对了_____题(共60题) 2 - 2 = 7 - 3 = 6 - 0 = 7 +11 = 16-2= 13- 3 = 8 - 6 = 0 +18 = 10+ 3 = 15-8= 18-11 = 17+ 0 = 2 - 2
24、= 1 + 7 = 13-5= 6 - 3 = 13+ 1 = 5 +14 = 11+ 0 = 12-8= 7 - 1 = 0 +10 = 6 - 1 = 2 + 6 = 14-12= 11-10 = 11+ 3 = 5 +10 = 12-10 = 16-8= 0 +11 = 5 +10 = 5 - 5 = 19-11 = 13-9= 17-13 = 2 + 2 = 3 +11 = 10+ 3 = 16-3= 17- 3 = 1 - 0 = 9 - 5
25、 = 19- 8 = 13-8= 8 + 0 = 17- 1 = 13-10 = 17+ 0 = 16-6= 5 - 3 = 9 - 8 = 7 - 3 = 2 - 2 = 9-2= 14- 2 = 5 - 3 = 0 + 4 = 9 - 8 = 13-5= 20以内加减法练习(难度指数★★) 姓名:________ 时间:_____ 做对了_____题(共60题) 1 + 3 = 5 +11 = 10+ 5 = 11- 1 = 17-9= 5 - 2 = 7
26、 - 6 = 12+ 6 = 10+ 9 = 18-12= 14+ 5 = 1 + 3 = 2 +10 = 8 +10 = 12-8= 10+ 8 = 2 - 1 = 9 - 1 = 9 - 5 = 16-12= 1 + 8 = 12+ 6 = 9 - 3 = 8 - 2 = 13-7= 17-11 = 11-10 = 7 - 6 = 19- 3 = 7-5= 15-11 = 7 - 4 = 16-14 = 5 - 2 = 9-3= 8 - 6 = 15- 2 = 1
27、6-13 = 3 +11 = 7-3= 8 - 7 = 2 +17 = 5 +14 = 14+ 4 = 8-2= 11+ 3 = 5 +12 = 16-12 = 7 + 2 = 10-4= 17- 4 = 7 +11 = 18- 7 = 4 + 5 = 7-5= 19-15 = 18- 2 = 11+ 2 = 14-12 = 9-5= 20以内加减法练习(难度指数★★) 姓名:________ 时间:_____ 做对了_____题(共60题) 19- 5 = 10+
28、 1 = 2 +15 = 19- 5 = 15- 5 = 12-11 = 3 + 3 = 18- 4 = 19-10 = 13- 4 = 16-16 = 1 + 8 = 1 +13 = 14- 4 = 16- 9 = 18-11 = 18- 7 = 0 +19 = 12+ 1 = 11- 8 = 15-11 = 12+ 3 = 18-13 = 6 - 0 = 11- 0 = 1 + 7 = 18-16 = 18- 6 = 9 - 1 = 15- 8 = 6 - 3 = 13- 1 = 19-15 =
29、 8 - 0 = 11- 3 = 6 - 6 = 0 +19 = 9 - 2 = 3 - 3 = 17- 4 = 12+ 3 = 2 +11 = 7 - 3 = 13- 2 = 19- 5 = 8 - 0 = 1 + 5 = 15+ 3 = 18-15 = 10- 2 = 2 + 4 = 19-17 = 3 + 6 = 2 - 1 = 17- 15 = 17-10 = 1 +15 = 7 - 6 = 3 + 6 = 5 +13 = 20以内加减法练习(难度指数★★) 姓名:
30、 时间:_____ 做对了_____题(共60题) 17- 2 = 2 + 3 = 14+ 0 = 13+ 0 = 17-15 = 0 + 1 = 18-12 = 18- 8 = 0 + 1 = 10-5 = 12-11 = 4 +11 = 12+ 7 = 3 +13 = 13-8 = 14+ 5 = 19- 1 = 14+ 1 = 3 +12 = 19-11 = 12+ 4 = 17-11 = 5 + 3 = 17-11 = 12-5 = 6 +10 = 17-16 = 18-
31、1 = 2 + 3 = 11-8 = 6 +12 = 12-10 = 5 +10 = 3 + 6 = 14-5 = 17-14 = 11+ 1 = 19-17 = 4 + 5 = 9-5 = 5 - 3 = 19-19 = 4 + 3 = 7 + 1 = 9-1= 4 - 3 = 3 + 1 = 4 - 2 = 1 + 7 = 9-8 = 13- 1 = 15- 3 = 7 - 1 = 12+ 2 = 8-5 = 1 +10 = 7 +10 = 15-10 = 18- 6 = 1
32、5-9 = 20以内加减法练习(难度指数★★★) 姓名: 时间: 成绩: (共100题) 4 + 4 = 18- 1 = 8 - 8 = 15+ 2 = 14+ 3 = 5 + 3 = 10+ 7 = 17- 3 = 12+ 7 = 10+ 3 = 16- 0 = 3 +16 = 15-14 = 14- 2 = 9 +10 = 15-12 = 5 - 3 = 2 +13 = 18+ 0 = 18- 3 = 8 + 0 = 1 - 0 = 19-19 = 6 - 1 = 6 - 3
33、= 11- 1 = 13-11 = 1 + 4 = 16- 2 = 14-10 = 14-13 = 11+ 2 = 11- 0 = 13-10 = 14- 2 = 16+ 2 = 10+ 6 = 14- 3 = 4 + 3 = 18-17 = 15-12 = 19-18 = 19-18 = 6 +12 = 10+ 2 = 17- 3 = 7 - 3 = 2 +11 = 11+ 1 = 13-10 = 2 +10 = 0 + 5 = 6 + 2 = 12- 2 = 17- 6 = 1 + 2 = 2 +13 = 13+ 4 =
34、5 + 2 = 19- 5 = 1 +12 = 9 - 1 = 2 + 1 = 11+ 4 = 18+ 1 = 12-12 = 15- 2 = 7 +12 = 1 +14 = 19-10 = 19-12 = 4 - 1 = 17-15 = 2 + 3 = 16-16 = 1 - 0 = 7 - 1 = 19- 1 = 1 + 4 = 2 + 2 = 1 +15 = 19-18 = 19-18 = 17- 1 = 3 - 0 = 7 - 0 = 7 - 1 = 12-11 = 3 +13 = 0 +10 = 11+ 0 = 8 -
35、 6 = 5 +12 = 19-18 = 15-10 = 17- 1 = 1 +13 = 11+ 8 = 12+ 3 = 16- 1 = 20以内加减法练习(难度指数★★★) 姓名: 时间: 成绩 (共100题) 17- 5 = 0 +18 = 18-14 = 17- 6 = 8 - 7 = 13+ 0 = 2 + 2 = 5 + 2 = 8 + 0 = 3 + 6 = 4 +12 = 9 - 5 = 6 - 1 = 2 + 3 = 17+ 2 = 3 +13 = 5 - 0 =
36、 3 - 0 = 11+ 5 = 0 + 4 = 9 +10 = 14-11 = 8 + 0 = 3 +10 = 11+ 7 = 16- 0 = 5 + 3 = 0 +11 = 1 + 8 = 12- 2 = 15- 1 = 6 - 5 = 19- 4 = 19-15 = 9 - 8 = 3 + 6 = 18- 5 = 8 +11 = 5 + 3 = 17+ 1 = 14+ 2 = 3 + 4 = 14-12 = 18- 7 = 4 +13 = 2 + 7 = 15- 1 = 18-18 = 3 +16 = 11-10 = 2
37、- 2 = 4 + 3 = 16- 6 = 6 +10 = 17+ 2 = 8 + 1 = 8 - 6 = 4 + 2 = 9 - 4 = 10+ 3 = 1 +15 = 6 - 5 = 1 +12 = 13-11 = 17-15 = 14+ 1 = 17-16 = 16- 5 = 18-10 = 15-10 = 1 +18 = 2 - 1 = 10+ 5 = 8 - 8 = 5 + 3 = 1 +17 = 16-15 = 16+ 2 = 2 - 1 = 10+ 3 = 3 +11 = 11-10 = 1 + 7 = 6 + 3
38、 = 2 +12 = 11-10 = 1 +12 = 7 +10 = 12+ 2 = 16-11 = 7 - 7 = 5 +12 = 2 +16 = 7 - 3 = 14- 1 = 11+ 2 = 5 - 3 = 16- 3 = 12+ 1 = 9 - 5 = 20以内加减法练习(难度指数★★★) 姓名: 时间: 成绩: (共100题) 18-11 = 10+ 7 = 15-12 = 1 +16 = 1 +16 = 5 - 5 = 3 + 3 = 10+ 6 = 18-12 =
39、7 - 7 = 4 - 1 = 12- 1 = 0 + 1 = 7 - 0 = 1 +10 = 15- 5 = 2 + 3 = 19- 9 = 17- 4 = 11+ 2 = 4 - 4 = 16+ 1 = 6 - 2 = 16- 1 = 16+ 3 = 5 - 5 = 18+ 0 = 7 +11 = 5 +12 = 13- 2 = 2 + 6 = 8 - 4 = 16+ 3 = 1 +13 = 4 - 0 = 7 - 2 = 18-10 = 17- 5 = 8 - 3 = 0 +11 = 9 + 0 = 16- 6 = 16-
40、 0 = 2 + 4 = 13+ 3 = 4 - 0 = 3 + 2 = 16-12 = 17- 4 = 0 +16 = 0 + 6 = 19+ 0 = 10+ 4 = 8 - 2 = 3 +11 = 2 + 6 = 11+ 3 = 19- 5 = 2 +11 = 11+ 3 = 10+10 = 16-14 = 9 - 4 = 4 + 3 = 5 - 4 = 7 - 5 = 5 + 4 = 5 - 3 = 17- 3 = 17- 4 = 14- 2 = 2 + 1 = 15+ 3 = 1 + 4 = 19-17 = 7 + 2
41、= 17-16 = 15- 4 = 15-12 = 14-12 = 3 + 3 = 5 + 1 = 19- 5 = 18-16 = 2 + 6 = 18- 8 = 2 +16 = 8 - 5 = 15+ 1 = 7 - 3 = 5 - 2 = 16-13 = 14+ 3 = 14+ 1 = 13- 2 = 3 +14 = 12+ 3 = 10+ 6 = 3 +15 = 13- 2 = 20以内加减法练习(难度指数★★★) 姓名: 时间: 成绩 (共100题) 1 +16 = 14+
42、2 = 1 +14 = 3 +14 = 7 - 5 = 7 - 1 = 10- 0 = 15+ 1 = 5 +10 = 2 + 5 = 11+ 6 = 8 - 8 = 11+ 7 = 9 - 6 = 10+ 6 = 1 + 0 = 7 - 1 = 17+ 0 = 19- 2 = 15-10 = 8 - 2 = 11+ 0 = 5 + 2 = 4 +10 = 2 + 4 = 2 + 3 = 12+ 3 = 15-14 = 1 +16 = 16- 3 = 18-10 = 17- 4 = 15- 4 = 15+ 2 = 16-14 =
43、 8 +10 = 15-10 = 15- 2 = 3 - 3 = 0 +19 = 15- 2 = 2 +10 = 5 +14 = 8 - 4 = 15- 4 = 7 - 3 = 2 +10 = 7 +11 = 11-10 = 14+ 2 = 12+ 0 = 4 + 3 = 19-19 = 4 +15 = 13- 0 = 12-12 = 5 +10 = 1 + 1 = 19- 3 = 15- 2 = 9 - 2 = 17- 3 = 8 - 6 = 10+ 1 = 18- 5 = 1 +10 = 19-18 = 8 - 2 = 2
44、 + 2 = 8 - 7 = 11+ 1 = 16+ 3 = 4 +10 = 19- 9 = 3 + 0 = 19- 5 = 12- 1 = 17- 3 = 3 + 1 = 17-12 = 17-16 = 12-11 = 3 +10 = 5 - 1 = 9 - 3 = 10+ 9 = 19- 6 = 2 +10 = 17- 2 = 4 +15 = 3 + 2 = 1 + 1 = 17-14 = 7 - 6 = 16- 5 = 3 +10 = 13+ 6 = 1 + 2 = 6 - 2 = 18- 1 = 20以内加减法练习(难
45、度指数★★★) 姓名: 时间: 成绩 (共100题) 0 +11 = 5 +14 = 0 + 7 = 0 + 6 = 19-16 = 0 + 0 = 18-13 = 18- 1 = 0 +11 = 1 +17 = 0 + 2 = 13-10 = 0 + 3 = 1 +15 = 9 - 9 = 10-10 = 3 +12 = 16- 0 = 0 + 0 = 17- 3 = 19- 6 = 2 +13 = 1 +10 = 2 +13 = 5 +12 = 12+ 7 = 8 - 7 =
46、7 - 4 = 9 + 0 = 3 +12 = 0 +11 = 5 + 1 = 12+ 0 = 18-11 = 1 + 4 = 19- 5 = 1 +15 = 2 + 4 = 16+ 1 = 6 +11 = 18- 7 = 19-11 = 10+ 9 = 6 - 5 = 16- 5 = 1 + 7 = 12-10 = 7 + 2 = 5 - 1 = 10+ 4 = 11+ 3 = 17-15 = 15- 3 = 15- 4 = 17- 1 = 3 + 5 = 18- 8 = 6 - 4 = 14-10 = 3 + 1 = 9 -
47、 1 = 19-10 = 2 + 2 = 7 + 1 = 19- 6 = 8 - 4 = 2 +11 = 17- 2 = 12+ 1 = 17-14 = 18- 6 = 4 + 3 = 3 +10 = 14-12 = 12- 1 = 2 +16 = 14+ 1 = 16-11 = 13-11 = 2 +14 = 5 +10 = 15+ 2 = 1 +18 = 17-10 = 12+ 1 = 19- 2 = 7 - 6 = 1 + 7 = 6 - 1 = 17+ 2 = 7 - 1 = 7 + 1 = 19-14 = 9 - 2
48、= 19-18 = 7 - 6 = 1 +11 = 2 +10 = 18- 3 = 10+ 9 = 20以内加减法练习(难度指数★★★) 姓名: 时间: 成绩: (共100题) 14+ 4 = 0 + 3 = 17-11 = 18-12 = 18- 5 = 14+ 4 = 0 +12 = 3 +11 = 7 +10 = 7 + 0 = 2 + 6 = 5 +12 = 5 +12 = 18- 3 = 19- 3 = 7 - 4 = 2 + 4 = 7 - 1 = 18-12 = 2
49、 +17 = 9- 8 = 10+ 1 = 7 - 5 = 7 +11 = 12+ 3 = 1 +14 = 17-14 = 1 +15 = 1 + 1 = 9 - 5 = 6 + 1 = 0 +17 = 6 +11 = 0 +17 = 6 - 1 = 16- 5 = 13- 2 = 6 +12 = 15-14 = 7 + 0 = 12+ 7 = 2 +10 = 5 +11 = 6 + 0 = 13-10 = 16-13 = 5 + 2 = 16-14 = 5 +13 = 2 +10 = 12+ 3 = 3 + 1 = 19- 1
50、 = 4 - 4 = 0 +18 = 12+ 5 = 2 +13 = 2 +15 = 19-13 = 18+ 0 = 4 +13 = 9 - 0 = 6 - 5 = 15- 4 = 10+ 2 = 6 +13 = 3 + 6 = 12+ 1 = 1 +18 = 18-11 = 1 + 8 = 4 + 4 = 12+ 4 = 0 +16 = 8 - 2 = 3 +10 = 2 + 1 = 6 - 6 = 3 +13 = 6 - 3 = 4 +13 = 5 + 1 = 7 - 5 = 19-19 = 13+ 2 = 16-14 =






