：
=2：________=________：10．直接写得数
| 343-289= | 32+82= | 1322-199= | 49× = | 1-3÷7= |
| 5×4×2= | 6÷2%= | 1.87+5.13= |  ÷6= |  ×4×= |
| 9.9÷0.1= | 0.35×200= | 0.32-0.22= |  ×25= |  + ×16= |
| 2.8×25+12= | 41+25= | 1- = |  ÷ = | 1-2× = |
| 343-289= | 32+82= | 1322-199= | 49×= | 1-3÷7= |
| 5×4×2= | 6÷2%= | 1.87+5.13= | ÷6= | ×4×= |
| 9.9÷0.1= | 0.35×200= | 0.32-0.22= | ×25= | +×16= |
| 2.8×25+12= | 41+25= | 1-= | ÷= | 1-2×= |
图中有9个点，上下左右两点相距都是1厘米，连接任意四点组成的正方形，它们的面积之和是_____平方厘米．
化成最简整数比是________，比值是________．