3．直接写出得数．
| 0.8+0.22= | 0.125+0.875= | 1.25×0.8= | 6.03×3.9≈ | 19.3-2.7= |
| 53×10.1= | 1.4×0.5= | 100-1.25= | 0.39+0.1= | 4.2÷5.6= |
19．直接写得数．
0 156231 156239 156245 156249 156255 156257 156261 156267 156269 156275 156281 156285 156287 156291 156297 156299 156305 156309 156311 156315 156317 156321 156323 156325 156326 156327 156329 156330 156331 156333 156335 156339 156341 156345 156347 156351 156357 156359 156365 156369 156371 156375 156381 156387 156389 156395 156399 156401 156407 156411 156417 156425 199269
| 1÷$\frac{3}{7}$= | 0.25×0.4= | 6.47+3.53= | 10-2.11= |
| $\frac{1}{2}$÷$\frac{1}{3}$= | $\frac{5}{8}$×$\frac{7}{5}$= | $\frac{3}{5}$×15= | 1÷30%= |
| $\frac{1}{2}$+$\frac{1}{3}$= | $\frac{7}{16}$-$\frac{1}{4}$= | 35÷0.7= | $\frac{4}{9}$×0.25= |