我能用简便方法计算．
| 97×103-3×97 | 11.3-0.46+9.7-0.54 | 4000÷125÷8 | 8.47-（5.47-2.38） |
简算下列各题
| 548+468+52 | 9.14-1.34-4.57 | 77+2.7+2.3+23 |
| 3200÷4÷25 | 125×32×25 | 2009×95+5×2009． |
用了10时，从北京到广州需要多长时间？ × = | 3.7+2.5= | 51÷0.25= | 1.1-0.11= |
÷ = | 68÷0.4= | × = | 3.27+7.3= |
| ×6= |  × = | 627-198= | 0.1÷50%= |
 ×15= | 9- = | 10-2 = | 3.8×0.1= |
 ×= | ÷50%= | ×40%= | 12%+25%= |
| 0.8÷3= | 280÷35= | 359+199= | 120%-70%= |
| 1.4×45= | 40÷10%= | 241-103= | 324-198= |
| 2-1.36= | -= | 33÷ = | 0.62+0.4= |
| 0.37-0.3= | 0.66÷0.3 | 100×0.48= | 5x-3x= |
| 35÷100= | 0.4×0.5= | -= | 0.23÷0.1= |
1- = | 0.8π= | 1-90%= | 1+= |
 ÷6= |