20以内加减法练习题

1、6+10 =6+ 10=13 3 =8+2=7+9 =9+1 + 4二16 6 =1()+9 =141 =8+3=7+5 =7+ 3 +5二1610=8+ 10=10 + 2 =2+9=8 + 6 =7+ 4 +6二10+3 =13-3 =13 3 =19-9 =8+8 =7+ 8+3二3+10 =5+ 10=3+15 =9+3=7 + 4 =6+ 4 + 7二13 3 =16 10 =18 8 =8+4=8+5 =8+ 2+5二1310=11 10 =5+ 5 =5+9=7+7 =5+ 4 +6二10+5 =1310 =4+6 =8+6=6+ 5=7+ 2+3二5+10 =18 10 =20

2、 20=4+9=1 + 9=3+4+ 10二10+8 =10- 10 =12 + 4 =5+9=7+3 =11-1-5二3+10 =10+ 9 =8 8 =6+ 9=6+=717- 7-3 =11 1 =1(05 =10+0 =7+9=5+6 =19- 9+1二8 + 4 =9+ 7=9+7 =9+0=10- 7 =13- 3-4二8 + 5 =6+ 6=6+ 5 =5+8=6+7 =18-10-4=9 + 6 =4+9=2+8 =8+9=2+二917- 10-7=6+8 =6+ 5=7+7 =9+9=9 + 4 =14- 10 +5=7+9 =5+8=8+8 =9+3=5+9 =16- 10

3、 +3=8+10 =5+ 7=4+8 =3+8=9+5=20- 10- 7=7 + 4 =8+7=8 + 6 =7+5=0 +11 =6+ 2+ 7二5+7 =4+8=7+6 =6+9 =19-16 =4+ 5+2二9+2=8+6二3+9=9+5 =0 +11 =3+ 5+ 7二7+8=7+ 10=5+9=7+7=0 + 3 =4 + 4 +6二9+8 =2+8二3+8二9+4=3 +12 =4+ 3 +2二9 + 2 =10-9 =6 + 4 =7+8=19- 6 =4 + 6 +5 =8 + 3 =2+ 10=7+2 =9+ 6=5 +12 =7 + 2 +4=6+7 =9+8二6+9 =

4、8+3=9 + 0 =2+ 6 +5二8+4=6+3二6+8=7+4=12+ 0 =7+1 + 7二1 + 9 =10+4=5+10=9+9=1 +15 =6+ 3 +4 =10 5 =6+8=13-3二8+4二18- 7 =6+1 + 5二9+5 =9+3=3+8 =7+6=16- 5 =5+ 2+4二8+2=7 + 4 =6+7 =9+4二5 - 1 =3+ 5 +9二5 + 2 =8 + 3 =5 4=6+8 =15- 3 =6+ 4 + 1二8 + 9 =9+8二7+6二7+9二18- 8 =3+ 6 +5二10+8 =8 + 5 =9+ 6=9+8=9 - 1 =7+ 2+6二5+5

5、 =9+5二7+8二9+3=19- 6 =4 + 4 +9=4+6=5+9=6+7二8+4=12+ 1 =9+1 + 9二9 + 4=8+4=9+7=8+3二3 +10 =8+ 2+2二7 + 4 =6+5二8+6二6+6二14+ 1 =7+ 3 + 1二8 + 4 =6+6二6+8 =16-8=5 +10 =8+ 2+4二10 2 =7+7二8+5=3+9=12+ 1 =7+ 3 +2二2 + 9 =9+ 7=5+8 =15-4=6 - 1 =8+ 2+6二7+5 =8+8=8 + 4=11-2=19-14 =7+ 3 +4二18 2 =9+2=4+8 =4+8=1 +11 =9+1 + 8

6、二10+5 =5+ 7=9 一 4二12+3=5 +14 =8+ 2+5二9 + 6=9+5=7+6 =16-8=0 + 0 =5+ 4 +9 =8 + 4 =7+9=6+7 =6+7=1 +17 =5+ 2+2二9 + 4 =8+ 10=7+5 =14-9=1 +15 =3+ 6 +4二8+7 =6+10二5+7二19-9=16- 0 =5+ 2+ 7二9+2=8+6=4+7二7+5=2 +13 =7- 3 +6二7+5 =19-7二7+4二16-8=12+ 7 =72+7二7+9 =7+3=9+3 =18-9=3 +12 =4+23二8 + 5 =2+8=6+6 =6+7=18-11 =6

7、+ 3+4二9+2=3+8=11-5=7+6=2 + 4 =4+ 2+5二12-4=6+5=13-5=8+5=19-11 =7+ 2+ 7二4+7=9+9=18-9=13-4=1 + 7 =8+1 + 2二17-7=5+7=7+7=6+6=10+ 4 =1+8+5二11-3=15-7=12-6=7+7=15- 4 =6+ 3 +9二6+8=14-8=9+6=16-2=6 4 =10- 1 + 2二11-4=5+8=2+9=11-6=19-10 =8- 2+6二15-8=6+10=15-3=11-9=8 - 4 =4 + 4 2=9+8=3+9=15-6=12-8=17-14 =6 + 2 +7

8、=8+7=16-7=5+6=10+6=14-12 =6+3 +7=16-8=6+6=15-9=17-8=16-11 =5+ 4+ 7二6+5=12-4=6+7=12-9=15+ 2 =4+5 +8=15-6=12-6=14-5=7+4=19- 2 =1 + 0 +7=9+3=12-5=4+9=14-7=17+ 2 =9 一 6 一1 =3+8=17-7=12-10=8+8=9 - 2 =5 + 4 +6=10+6=16-7=9+6=6+7=2 +10 =5+1 +7=8+7=4+13=11-1 =6+6=0 + 7 =2+ 3+9二11-2=12-7=17-9=16-8=18-13 =7 +

9、2 +6=5+6=9+8=15-9=7+4=0 + 2 =9+1 + 5二6+8=13+6=8+4=11-7=9 - 9 =7+3 +2=8+8=7+9=10+2=14-7=0 + 0 =10+8-4 二6+5=4+7=13-8=16-9=1 +10 =7 2 +9=13-7=14-9=9+5=9+6=8 - 7 =6 + 2 +7=15-7=8+9=15-9=12-3=0 +11 =8 + 2 +7=7+8=8+3=7+5=12+3=1 + 4 =6 3 +9=9+4=13-9=7+6=17- 5 =16+ 1 =3+ 6+9二9+6=8+5=16-8=16- 1 =10+ 9 =2+ 6+

10、5 =8+6=10+5=9+9=6 +10 =12-10 =7+25二18-8=14-9=18-9=10+ 2 =11+ 3 =9- 2+ 7二3+9=11-7=14-2=4 + 1 =17- 1 =8- 2+8二11-3=5+6=15-8=4 +12 =14-10 =9 4+7二11-2=16-9=4+8=14+ 1 =2 + 2 =8- 2+ 7二15-7=13-7=12-8=7 - 2 =2 +11 =9- 4+ 7二16-7=15-8=13-9=10+ 4 =18- 6 =6+ 2+9二8+5=10+3=9+3=13- 2 =12- 1 =8- 2+3二7+8=13-8=9+5=15+

11、 4 =13-11 =9- 4+6二9+4=5+8=17-8=19- 14 =1 +18 =4+ 3+5二8+6=14-8=17-7=16- 4 =7 - 6 =6+23二15-8=13-4=18-4=4 +12 =7 - 1 =3+ 9+6二18- 5 =17- 11 =13+ 6 =17-15 =19-18 =10- 5 + 4二16-10 =5 4 =9 4 =16+ 1 =18- 3 =3+ 4+6二7 +10 =9 - 0 =18+ 1 =11+ 5 =0 + 6 =9- 6+4二4 0 =18-12 =17-17 =12+ 4 =18- 1 =4+ 5+8二10-10 =9 - 0

12、 =15- 0 =17-10 =13-10 =7+ 5- 7 =0 +16 =2 + 2 =13-12 =13+ 2 =10-10 =10-4-0二13+ 4 =6 5 二15-13 =1 +14 =17- 3 =4+ 5+8二3 +12 =0 + 0 =0 +17 =11+ 1 =2 +13 =2+ 3+4二2 +14 =11-10 =11+ 4 =2 +11 =7 - 4 =6+ 3+8二14- 3 =11- 1 =3 - 1 =3 + 1 =5 + 1 =3+ 3+2二12- 0 =11+ 0 =13-10 =5 + 4 =19- 5 =2+ 2+4二3 + 5 =10+ 7 =0 +

13、1 =7 +11 =6 +11 =4+ 8+ 7二11+ 1 =17- 1 =16+ 2 =10+ 3 =6 5 二10+ 2+7二3 + 4 =1 +14 =14+ 2 =1 + 7 =7 + 2 =12+6 5二12+ 5 =14+ 1 =10+ 8 =11+ 0 =17-15 =7- 7+ 5二15- 3 =9 - 8 =11+ 5 =2 + 6 =3 + 5 =8+ 2+ 7二12+ 3 =17- 12 =1 +17 =12-10 =3 + 1 =8- 3+ 7二2 + 6 =19- 5 =7 - 3 =19- 11 =7 + 1 =5+ 2+3二10+ 7 =1 +12 =11+ 1

14、 =10+ 3 =17- 2 =6+ 2+2二9 - 9 =4 +12 =11+ 2 =19- 8 =4 + 3 =3+ 3+ 1二16- 1 =19- 13 =4 3 =17+ 0 =2 +16 =2+ 3+5二15- 3 =6 5 二13+ 1 =2 - 2 =2 +14 =3- 0+ 7 =19- 1 =2 + 6 =19-18 =11- 1 =17-10 =5- 5+ 5二2 + 6 =18-13 =12+ 7 =10+ 9 =1 + 7 =7- 3+4二3 + 4 =16- 14 =18- 2 =8 +10 =7 + 1 =6+26二2 - 2 =7 - 3 =6 0 =9 5 =7

15、 - 6 =8- 7+6二13- 3 =8 6 =0 +18 =8 - 2 =10+ 9 =5+1 + 7二18-11 =17+ 0 =2 - 2 =19- 3 =14+ 4 =0+3二6 - 3 =13+ 1 =5 +14 =5 - 2 =18- 5 =14 +4二7 - 1 =0 +10 =6 - 1 =3 +11 =7 +10 =7+0二11-10 =11+ 3 =5 +10 =14+ 4 =5 +12 =18 -3二0 +11 =5 +10 =5 5 二7 + 2 =2 + 4 =7 1二17-13 =2 + 2 =3 +11 =4 + 5 =9- 8 =10 +1二17- 3 =1

16、0 =9 5 =9 - 8 =12+ 3 =1 + 14二8 + 0 =17- 1 =13-10 =3 - 0 =1 + 1 =9-5二5 3 二9 - 8 =7 - 3 =14- 12 =6 +11 =0+17二1 + 3 =5 +11 =10+ 5 =19- 5 =13- 2 =6+12二5 2 二7 6 二12+ 6 =19-10 =12+ 7 =2+10二14+ 5 =1 + 3 =2 +10 =14- 4 =13-10 =16 13二10+ 8 =2 - 1 =9 - 1 =12+ 1 =5 +13 =2+10二1 + 8 =12+ 6 =9 - 3 =6 0 =19- 1 =4 一

17、 4二17-11 =11-10 =7 - 6 =9 - 1 =2 +13 =2+15二15-11 =7 - 4 =16-14 =8 - 0 =4 +13 =9-0二8 6 =15- 2 =16-13 =3 - 3 =10+ 2 =6+13二8 - 7 =2 +17 =5 +14 =13- 2 =1 +18 =18 11二11+ 3 =5 +12 =16-12 =18-15 =12+ 4 =0+16二17- 4 =7 +11 =18- 7 =2 - 1 =2 + 1 =6-6二14- 2 =5 3 二0 + 4 =3 + 6 =4 +13 =5 +1二17-14 =16- 14 =3 +12 =

18、19- 7 =13+ 2 =16 14二19-15 =18- 2 =11+ 2 =13+ 0 =6 - 2 =4+12二19- 5二10+ 1二2 +15二0 + 1二4 1二16 二1412-11二3 + 3二18- 4二3 +13二12-11二4 一二116-16二1 + 8二1 +13二3 +12二17-11二18 二1218-11二18- 7二0 +19二17- 11二0 +12二3 +二1115-11=12+ 3=18-13=2 + 3=2 + 6=5 +二121 + 7二18-16二18- 6二3 + 6二19- 3二7 一二46 - 3二13- 1二19-15二4 + 5二18-

19、12二2 +二176 - 6二0 +19二9 - 2二7 + 1二7 - 5二7 +二1112+ 3二2 +11二7 - 3二1 + 7二17-14二1 +二158 - 0二1 + 5二15+ 3二12+ 2二6 + 1二0 +=172 + 4二19- 17二3 + 6二18- 6二6 1二16 二517-10二1 +15二7 - 6二16- 14二15-14二7 +二02 +14二5 +13二15+ 1二19- 19二5 +11二6 +二017- 2二2 + 3二14+ 0二12-12二5 + 2二16 二140 + 1二18-12二18- 8二3 - 0二12+ 3二3 +二112-11二

20、4 +11二12+ 7二4 一 0二0 +18二12 +二514+ 5二19- 1二14+ 1二19- 18二19-13二18 +二012+ 4二17- 11二5 + 3二9 1二6 - 5二15 二46 +10二17- 16二18- 1二17- 6二3 + 6二12 +二16 +12二12-10二5 +10二19- 1二1 + 8二4 +二417-14二.11 + 1二.19-17二.12-11二.8 - 2二.3 +10二5 3 二19- 19 =4 + 3 =1 +13 =3 +13 =6-3二4 3 =3 + 1 =4 2 =18- 2 =7 - 5 =19 19二13- 1 =15-

21、 3 =7 - 1 =2 +14 =16+ 3 =13 13二1 +10 =7 +10 =15-10 =8 +10 =10+ 0 =6-2二1 + 7 =3 - 2 =18- 3 =2 + 4 =6 +12 =15 +3二1 +18 =13- 0 =15- 0 =1 +14 =16-14 =12 +4二17+ 0 =16- 4 =2 - 2 =2 + 6 =2 + 4=6 5 =19- 4 =11+ 2 =3 +15 =1 + 1 =8 一 4=6+ 0 =0 + 9 =4 +10 =0 +11 =12+ 4 =1 + 1 =8+ 1 =4 3 =0 + 5 =9 - 0 =6 - 1 =4

22、+ 4=5- 1 =17+ 2 =16+ 1 =12-10 =1 +14 =3-3=1 + 5 =1 + 7 =10+ 8 =5 + 2 =18-13 =4-1 =9- 3 =18- 8 =3 - 0 =0 - 0 =3 +15 =1 + 9=0+ 9 =11-10 =12-10 =7 - 3 =5 +12 =10-5=10-4=15-12 =15- 11 =6 +10 =11+ 2 =3 + 6=3+ 5 =4 + 3 =3 +14 =2 +13 =1 +16 =0 + 6=10-7=8 - 4 =6 - 2 =9 - 1 =17- 16 =4+ 5=7+ 3 =10+ 2 =7 - 4 =

23、15-11 =19- 17 =9-2=0+ 5 =13- 3 =1 +12 =4 +15 =1 +11 =10-3=9- 2 =15- 1 =16- 2 =10+ 3 =12- 1 =5 + 2=5+ 3 =16+ 2 =10+ 7 =2 + 5 =1 +15 =4+ 5=2+ 6 =1 + 2 =14+ 3 =11+ 8 =15- 11 =10-5=2+2=17-16 =1 + 2 =5 +14 =13+ 5 =3 + 4=9- 5 =18-17 =12+ 3 =17-15 =1 +13 =8-5=6+ 3 =6 5 二6 + 2 =16+ 3 =2 +10 =1 + 3=8+ 2 =16+

24、 1 =4 +15 =2 + 3 =12- 2 =3+3=3+ 5 =7 - 1 =15- 1 =17- 6 =18- 6 =9-2=8 6 =1 + 2 =12+ 3 =16- 1 =17- 5 =3+0=6+ 2 =15-11 =19- 18 =11+ 6 =16-13 =6 6=9- 0 =19+ 0 =1 +18 =7 - 1 =5 + 1 =9-1 =8+ 2 =4 + 2 =16- 15 =1 1 =9 - 9 =9-0=3+ 4 =7 + 1 =5 - 2 =2 + 4 =3 +14 =5 4=0+9=10+10 =6 - 1 =1 + 0 =15+ 4 =4+ 3=7- 1 =

25、2 +10 =0 + 4 =18-15 =5 + 3 =6-3=2+ 5 =15-13 =5 +14 =3 + 0 =19- 8 =4-2=10-3=6 0 =8 - 0 =12+ 7 =19- 5 =5+3=10-3=13+ 4 =0 + 0 =19- 8 =13- 3 =8 一 4=8- 5=18- 6 =18- 4 =1 +16 =19- 8 =7+0=3+ 4 =9 - 0 =8 - 0 =9 - 2 =9 6 =10-5=9- 2 =14- 2 =18- 6 =19-14 =4 +12 =5-1 =5+ 2 =0 +17 =10+ 6 =5 + 4 =7 +11 =4-0=4+ 5

26、=19-19 =1 +14 =3 +13 =1 + 2 =10-8=9- 5 =16- 3 =18- 4 =7 +11 =17- 10 =5+5=10- 3=12+ 5 =10+ 3 =5 - 1 =14+ 0 =1 + 9=0+ 8 =6 + 1 =9 5 =4 + 1 =16- 1 =10-5=10-7=14-10 =16- 6 =13-10 =8 - 7 =9-2=6 6 =6 - 1 =15- 5 =5 + 3 =18- 4 =2+2 =5 4=18- 2 =19- 13 =11+ 5 =15- 14 =9 5=4+ 3 =19- 1 =16- 14 =15- 4 =17- 17 =0

27、+5=3+ 0 =16-14 =2 +12 =11+ 3 =10+ 8 =5+3=9- 1 =17-14 =17+ 2 =4 +14 =2 - 1 =2 + 6=9- 0 =1 +14 =16- 11 =12-10 =9 - 2 =6+3=6- 3 =2 + 6 =7 + 2 =14-10 =14+ 5 =8 + 2=4- 2 =19- 5 =6 5 二15- 5 =8 - 7 =2+5=3+6=15-15 =12- 1 =0 +11 =3 + 4 =7+3=9- 2 =14-12 =15- 2 =11+ 0 =12+ 4 =9-0=10-5=1 +15 =0 +11 =0 + 9 =19-1

28、0 =0+9=10- 8=1 + 8 =15+ 0 =5 + 0 =2 +12 =7-1 =0+ 9 =3 + 2 =6 - 1 =5 + 0 =16+ 3 =6 + 2=7+ 0 =13-12 =1 + 3 =9 + 0 =11+ 8 =8 + 2=5- 1 =18- 4 =13- 11 =9 - 7 =19- 4 =3 + 4=4- 0 =2 + 5 =10+ 5 =3 +11 =4 3 =2 + 5=10-4=17-12 =12-12 =6 +10 =19- 1 =10-3=3+ 5 =4 - 1 =5 2 二2 + 5 =18-16 =0+7=1+8=15- 3 =1 +14 =6 +

29、12 =14- 13 =8 6=8一 4 =18- 6 =1 +10 =15- 5 =15+ 2 =10-5=2+8=6 +13 =1 +14 =8 + 1 =17- 3 =3 + 4=9- 9 =18- 1 =3 +10 =14+ 4 =3 +16 =8-5=2+ 3 =12-11 =17- 16 =10+ 9 =15- 12 =1 + 3=7+ 2 =1 +13 =12+ 2 =10+ 3 =18- 3 =2 + 4=6 5 =3 +12 =16+ 2 =7 - 4 =6 - 1 =8 一 4=6+ 0 =14-10 =11+ 6 =19-16 =1 + 4 =8 4=1+9=7 +11

30、=10+ 6 =2 + 4 =11+ 2 =4 + 6=7- 3 =3 +12 =17- 5 =19- 3 =16+ 2 =6-2=2+ 8 =1 + 4 =18- 3 =1 + 7 =18-17 =7-2=10-4=14+ 3 =3 +16 =15-12 =6 +12 =4 + 4=5- 3 =10+ 6 =0 +16 =16- 2 =2 +11 =9-2=6 6 =2 +15 =2 +12 =16- 2 =0 + 5 =10-3=8- 5=2 +17 =10- 10 =19- 7 =1 + 2 =3 + 4=9- 5 =4 + 4 =18- 1 =8 - 8 =19- 5 =9-2=0+

31、5 =14+ 3 =5 + 3 =10+ 7 =11+ 4 =3+0=6+ 2 =12+ 7 =10+ 3 =16- 0 =7 +12 =5+3=9- 1 =15-14 =14- 2 =9 +10 =4 - 1 =4+ 5=2+ 6 =5 3 二2 +13 =18+ 0 =1 0 =3+0=2+5=8 + 0 =1 0 =19-19 =2 + 2 =0+3=8+ 2 =6 - 3 =11- 1 =13-11 =17- 1 =3+6=0+7=16- 2 =14- 10 =14-13 =12-11 =7+0=5+ 2 =11- 0 =13-10 =14- 2 =8 6 =8 + 2=5- 1 =1

32、0+ 6 =14- 3 =4 + 3 =17- 1 =9-0=3+ 4 =15-12 =19- 18 =19-18 =16- 1 =9 6=5+ 5 =10+ 2 =17- 3 =7 - 3 =17- 6 =4-2=10-3=11+ 1 =13- 10 =2 +10 =5 + 2 =1+8=0+ 6 =6 + 2 =12- 2 =17- 6 =9 5 =4 + 4=7+ 3 =2 +13 =13+ 4 =5 + 2 =3 +13 =10-0=9- 2 =1 +12 =9 - 1 =2 + 1 =0 + 4 =9-1 =9- 3 =18+ 1 =12-12 =15- 2 =3 +10 =8-5=

33、2+2=1 +14 =19- 10 =19-12 =0 +11 =0+5=3+ 0 =17-15 =2 + 3 =16-16 =6 5 二8 + 2=0+ 3 =7 - 1 =19- 1 =1 + 4 =3 + 6 =5+1 =9- 3 =1 +15 =19- 18 =19-18 =17+ 1 =7+3=9- 2 =3 - 0 =7 - 0 =7 - 1 =18- 7 =2 + 6=9- 0 =3 +13 =0 +10 =11+ 0 =18-18 =9-2=6 6 =5 +12 =19- 18 =15-10 =4 + 3 =9-2=8 6 =1 +13 =11+ 8 =12+ 3 =8 + 1

34、 =8 6=5+ 1 =17- 5 =0 +18 =18-14 =10+ 3 =7 + 2=5- 4 =8 - 7 =13+ 0 =2 + 2 =13- 11 =5 4=0+9=8 + 0 =3 + 6 =4 +12 =16- 5 =9-2=6+ 2 =6 - 1 =2 + 3 =17+ 2 =2 - 1 =4-2=10-3=5 0 =3 - 0 =11+ 5 =1 +17 =5+5=7+ 2 =9 +10 =14- 11 =8 + 0 =10+ 3 =4+ 5=8 6 =11+ 7 =16- 0 =5 + 3 =6 + 3 =4 + 4=3+ 4 =1 + 8 =12- 2 =15- 1 =

35、7 +10 =2+2 =9- 0 =19- 4 =19- 15 =9 - 8 =5 +12 =8 一 4=6+4=18- 5 =8 +11 =5 + 3 =11+ 2 =10-4=10-4=14+ 2 =3 + 4 =14-12 =9 5 =9-1 =4- 0 =4 +13 =2 + 7 =15- 1 =1 +16 =10-8=6+ 2 =3 +16 =11-10 =2 - 2 =10+ 6 =7+0=3+ 5 =16- 6 =6 +10 =17+ 2 =12- 1 =3+5=7+ 0 =8 6 =4 + 2 =9 4 =15- 5 =5-4=8+ 2 =1 +15 =6 5 二1 +12 =

36、11+ 2 =8 一 4=9- 5 =17-15 =14+ 1 =17-16 =16- 1 =4-0=6+ 3 =18-10 =15- 10 =1 +18 =7 +11 =10-5=6- 3 =10+ 5 =8 - 8 =5 + 3 =8 - 4 =9-0=10-5=16-15 =16+ 2 =2 - 1 =7 - 2 =2+2 =5 4=3 +11 =11-10 =1 + 7 =0 +11 =4+ 3=7- 1 =2 +12 =11-10 =1 +12 =2 + 4 =0+9=10- 8=12+ 2 =16- 11 =7 - 7 =16- 12 =9 6=0+ 6 =2 +16 =7 - 3

37、 =14- 1 =19+ 0 =10-0=9- 2 =5 3 二16- 3 =12+ 1 =2 + 6 =5+5=5+ 1 =18-11 =10+ 7 =15-12 =11+ 3 =2 + 5=2+ 6 =1 +16 =5 5 二3 + 3 =4 + 3 =18-12 =7 - 7 =4 - 1 =5 3 二9 6=0+ 6 =0 + 1 =7 - 0 =1 +10 =2 + 1 =10-0=9- 2 =2 + 3 =19- 9 =17- 4 =7 + 2 =5+5=5+ 1 =4 4 =16+ 1 =6 - 2 =14- 12 =2 + 5=2+ 6 =16+ 3 =5 5 二18+ 0 =18-16 =7+0=5+ 4 =5 +12 =