一共有36盆花．
4．用竖式计算
| 4.8+5.1= | 6.7-2.4= | 7.6+3.3= |
| 3.7+1.5= | 6.1-4.2= | 10-5.5= |
3．
0 160223 160231 160237 160241 160247 160249 160253 160259 160261 160267 160273 160277 160279 160283 160289 160291 160297 160301 160303 160307 160309 160313 160315 160317 160318 160319 160321 160322 160323 160325 160327 160331 160333 160337 160339 160343 160349 160351 160357 160361 160363 160367 160373 160379 160381 160387 160391 160393 160399 160403 160409 160417 199269
| 直接写出得数 0.3+0.2= | 4.5-4.5= | 2.8-0.8= |
| 0.7-0.6= | 1.5+0.3= | 3.2+2.3= |
| 5.2-3.1= | 3+4.1= | 1.4-0.4= |
| 0.8+0.5= | 0.1+0.9= | 6.7-3.9= |