文档介绍：.. -
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1+1= 2+1= 3+1= 1+2=
2+2= 1+3= 2-1= 1-1=
3-1= 4-1= 4-2= 3-2=
2-2= 4-3= 3-3= 4-4=
1+4= 2+3= 2+4= 3+4=
3+3= 4+1=
3+2=
4+2=
4+3= 6-3=
5-1=
5-2=
6-2=
7-3=
3+3=
5-3=
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5-3=
6-4=
7-4=
6-3=
7-3=
7-4=
4+4=
8-4=
7-6= 7-7=
8-7=
8-6=
1+1+2= 1+2+6= 1+3-2=
1+5+4=
1+4+2=
4+1-4= 5-1+2=
5-4+8=
1+3-3=
4-3+2= 3+1-3=
1+2-3=
3+2-1=
5-2+3= 5-3+2=
4+2+3=
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3-2+3=
1+3-2= 1+2-3=
2+2-1=
6-2+1=
6-4+7= 3+4-6=
4+3+2=
4-1-2=
4-2+3= 4-4+3=
4-3+3=
7-4+2=
4+4-6= 8-4-2=
3+3+3=
1+3-1=
4-1+1= 2+2-2=
1+2-1=
6-2-2=
9-3-3= 9-4-3=
7-2-2=
1+5-1=
1+5-5= 1+5-6=
5+1-5=
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9-6+2=
4-1+2= 5+2-4=
6+2-7=
7-6+4=
8-