52-32 |
552-332 |
5552-3332 |
|
52-32 |
552-332 |
5552-3332 |
|
| ||
2-1 |
| ||
3-1 |
| ||
4-1 |
| ||
5-1 |
| ||
n-1 |
| ||
(n+1)-1 |
A.P<Q | B.P=Q |
C.P>Q | D.与n的取值有关 |
A.30° | B.37° | C.38° | D.39° |
9×9+19 |
99×99+199 |
999×999+1999 |
9999×9999+19999 |
999…9(n个9)×999…9(n个9)+1999…9(n个9) |
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