1、1+1= 1+2=1+3=1+4=1+5=1+6=1+7=1+8=1+9=1+10 =1+11 =1+12 =1+13 =1+14 =1+15 =1+16 =1+17 =1+18 =1+19 =2+1=2+2=2+3=2+4=2+5=2+6=2+7=2+8=2+9=2+10 =2+11 =2+12 =2+13 =2+14 =2+15 =2+16 =2+17 =2+18 =3+1=3+2=3+3=3+4=3+5=3+6=3+7=3+8=3+9=3+10 =3+11 =3+12 =3+13 =3+14 =3+15 =3+16 =3+17 =4+1=4+2=4+3=4+4=4+5=4+6=4+7=4
2、+8=4+9=4+10 =4+11 =4+12 =4+13 =4+14 =4+15 =4+16 =5+1=5+2=5+3=5+4=5+5=5+6=5+7=5+8=5+9=5+10 =5+11 =5+12 =5+13 =5+14 =5+15 =6+1=6+2=6+3=6+4=6+5=6+6=6+7=6+8=6+9=6+10 =6+11 =6+12 =6+13 =6+14 =7+1=7+2=7+3=7+4=7+5=7+6=7+7=7+8=7+9=7+10 =7+11 =7+12 =7+13 =8+1=8+2=8+3=8+4=8+5=8+6=8+7=8+8=8+9=8+10 =8+11 =8+12
3、=9+1=9+2=9+3=9+4=9+5=9+6=9+7=9+8=9+9=9+10 =9+11 =10+1 =10+2 =10+3 =10+4 =10+5 =10+6 =10+7 =10+8 =10+9 =10+1 0=11+1 =11+2 =11+3 =11+4 =11+5 =11+6 =11+7 =11+8 =11+9 =12+1 =12+2 =12+3 =12+4 =12+5 =12+6 =12+7 =12+8 =13+1 =13+2 =13+3 =13+4 =13+5 =13+6 =13+7 =14+1 =14+2 =14+3 =14+4 =14+5 =14+6 =15+1 =15+2 =15+3 =15+4 =15+5 =16+1 =16+2 =16+3 =16+4 =17+1 =17+2 =17+3 =18+1 =18+2 =19+1 =20-1 =20-2 =20-3 =20-4 =20-5 =20-6 =20-7 =20-8 =20-9 =20-1 0=20-1 1=20-1 2=20-1 3=20-1 4=20-1 5=20-1 6=20-1 7=20-1 8=20-1 9=20-2 0=
