3 |
7 |
2 |
3 |
4 |
7 |
1 |
2 |
71 |
72 |
3 |
7 |
2 |
3 |
4 |
7 |
3 |
7 |
8 |
3 |
7 |
4 |
1 |
2 |
1 |
2 |
1 |
3 |
1 |
2 |
1 |
3 |
1 |
2 |
1 |
2 |
71 |
72 |
1 |
72 |
1 |
72 |
1 |
2 |
1 |
2 |
A.-3+2=1 | B.-3-2=-1 | C.(-3)÷(-
| D.-(-3)2=9 |
S1+S2+…+Sn |
n |
A.2004 | B.2006 | C.2008 | D.2010 |
A.290元 | B.265元 | C.65元 | D.90元 |
1 |
1×3 |
1 |
3×5 |
1 |
5×7 |
1 |
99×101 |
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