，就可以得到下面3个不向的图形．请你正确填出观察者所处的位置．
________
________
________．口算：
| 12×0.6= | 4.5÷ = |  - = | 28×20%= | 1.6× = |
1÷ = | 36× = | 15÷ = | 32= | 0.12= |
| 18.84÷3.14= | 6.28÷3.14= |  -= | 35× = | 1-4%= |
| 7÷1.4= | 1÷5%= | 70%-60%= | 80×125%= | 2+53%= |
求未知数的值．
 | 8x+3x=0.22． |
| 12×0.6= | 4.5÷= | -= | 28×20%= | 1.6×= |
| 1÷= | 36×= | 15÷= | 32= | 0.12= |
| 18.84÷3.14= | 6.28÷3.14= | -= | 35×= | 1-4%= |
| 7÷1.4= | 1÷5%= | 70%-60%= | 80×125%= | 2+53%= |
| 8x+3x=0.22． |
与12的差除以20与6的和的商为________．