14．我会用竖式计算（标*的题目要验算）．
| 19×19= | 37×85= | *238÷6= |
| 4.5+0.8= | 12.4-1.05= | *816÷4= |
13．我能很快写出得数．
0 163261 163269 163275 163279 163285 163287 163291 163297 163299 163305 163311 163315 163317 163321 163327 163329 163335 163339 163341 163345 163347 163351 163353 163355 163356 163357 163359 163360 163361 163363 163365 163369 163371 163375 163377 163381 163387 163389 163395 163399 163401 163405 163411 163417 163419 163425 163429 163431 163437 163441 163447 163455 199269
| 12×40= | 9.4-0.8= | 2.5+1.75= | 30×50= |
| 60×50= | 6.4-3= | 0÷68= | 10-0.3= |
| 1.8+2.7= | 720÷9= | 540÷6= | 5+6×2= |
| 38×40≈ | 99×71≈ | 418÷7≈ | 449÷9≈ |