根据线段图列式计算
3．递等式计算．
| 18+3660÷12 | 12.8×25-1.28×150 | 8.76-5.29-2.71+1.24 |
| 2÷$\frac{5}{8}$×$\frac{25}{24}$ | 48×[1-（$\frac{1}{4}$+$\frac{1}{3}$）] | （$\frac{3}{8}$+$\frac{5}{12}$）×24 |
2．直接写出得数．
| 2250÷30= | 5.13-2.46= | 2.5×2.4= | $\frac{2}{5}$+$\frac{3}{4}$=142-69= | 0.56÷8= |
| 6.4+3$\frac{3}{5}$= | 1.2×$\frac{5}{6}$= | 5.4+9= | 0.6×0.6= | 7$\frac{1}{5}$÷0.8= |
| $\frac{2}{3}$-$\frac{5}{12}$= | 0.32-0.22= | 11÷$\frac{1}{11}$= | 3$\frac{1}{5}$-$\frac{1}{6}$-$\frac{5}{6}$= | $\frac{3}{7}×\frac{2}{5}$×5×7= |
19．直接写出得数．
0 156204 156212 156218 156222 156228 156230 156234 156240 156242 156248 156254 156258 156260 156264 156270 156272 156278 156282 156284 156288 156290 156294 156296 156298 156299 156300 156302 156303 156304 156306 156308 156312 156314 156318 156320 156324 156330 156332 156338 156342 156344 156348 156354 156360 156362 156368 156372 156374 156380 156384 156390 156398 199269
| 728-299= | 3.6×25%= | 0.25×24= | 0.23= |
| 6÷$\frac{6}{7}$= | $\frac{1}{4}$-$\frac{1}{5}$= | 3-$\frac{6}{7}$= | $\frac{2}{9}$×$\frac{5}{6}$= |
| 1-$\frac{5}{8}$+$\frac{3}{8}$= | 8-1.3-1.7= | 0.13+$\frac{7}{8}$+0.87= | $\frac{1}{4}$÷4×$\frac{1}{4}$= |