3.计算下面各题,能简算的要简算.
43×98 | 138.5-9.6-0.4 | ($\frac{4}{5}$+$\frac{1}{4}$)÷$\frac{7}{3}$+$\frac{7}{10}$ |
$\frac{4}{7}$×$\frac{5}{18}$+$\frac{3}{7}$÷$\frac{18}{5}$ | 315÷(36%+9%) | 10.5×(3.8-0.8)÷6.3 |
2.直接写出得数
0.3×0.12= | 12×$\frac{3}{4}$= | 8.4+2.71= | 0×12%= | 450÷90= | 7-3.14= |
$\frac{1}{32}$×4= | $\frac{3}{4}$×$\frac{7}{12}$= | 2.1÷0.03= | 1÷6= | $\frac{1}{3}$+$\frac{1}{7}$= | $\frac{1}{2}$÷$\frac{1}{6}$= |
$\frac{14}{15}$÷2= | 12.7+10%= | $\frac{1}{5}$×30%= | 1+$\frac{2}{7}$= | $\frac{9}{8}$÷$\frac{8}{9}$= | $\frac{5}{3}$-$\frac{7}{15}$-$\frac{8}{15}$= |
19.口算.
8.1÷0.03= | $\frac{3}{5}$+3= | $\frac{5}{16}$×$\frac{8}{15}$= | $\frac{7}{9}$-$\frac{1}{3}$= | $\frac{8}{9}$×$\frac{9}{24}$= |
134-18= | 1.5×4= | 7.45+8.55= | 25÷$\frac{1}{10}$= | 2.4-$\frac{1}{2}$= |
3.5×$\frac{5}{7}$= | $\frac{3}{7}$×$\frac{2}{3}$= | 203= | 0.2×25.4= | 7.1+29= |
34.2÷0.8= | 3.6÷0.06= | 1÷3=112= | 29÷18= |
18.一个圆柱比与它等底等高的圆锥的体积多( )
0 156255 156263 156269 156273 156279 156281 156285 156291 156293 156299 156305 156309 156311 156315 156321 156323 156329 156333 156335 156339 156341 156345 156347 156349 156350 156351 156353 156354 156355 156357 156359 156363 156365 156369 156371 156375 156381 156383 156389 156393 156395 156399 156405 156411 156413 156419 156423 156425 156431 156435 156441 156449 199269
A. | $\frac{1}{3}$ | B. | 3倍 | C. | $\frac{1}{2}$ | D. | 2倍 |