16．简便计算：
| 410-$\frac{1}{7}$-$\frac{2}{7}$-$\frac{4}{7}$ | 9$\frac{3}{4}$+99$\frac{3}{4}$+999$\frac{3}{4}$+9999$\frac{3}{4}$ | 10.9-1.6-3 $\frac{2}{5}$ | 49×$\frac{5}{48}$ |
| 2÷$\frac{4}{25}$÷$\frac{25}{12}$ | （$\frac{1}{2}$+$\frac{1}{3}$+$\frac{1}{6}$）×24 | 0.125×32×25 | 123×5.67+8.77×567 |
15．直接写得数．
0 158168 158176 158182 158186 158192 158194 158198 158204 158206 158212 158218 158222 158224 158228 158234 158236 158242 158246 158248 158252 158254 158258 158260 158262 158263 158264 158266 158267 158268 158270 158272 158276 158278 158282 158284 158288 158294 158296 158302 158306 158308 158312 158318 158324 158326 158332 158336 158338 158344 158348 158354 158362 199269
| 7.8-5.8= | 6.3÷0.1= | 350×0.02= | 910÷70= | 9300÷5÷6= |
| $\frac{1}{2}$-$\frac{1}{4}$= | $\frac{1}{3}$+$\frac{1}{9}$= | 6÷$\frac{1}{6}$= | $\frac{7}{8}$+$\frac{7}{8}$÷$\frac{7}{8}$= | 1÷$\frac{1}{10}$-$\frac{1}{10}$÷1= |