16.直接写出得数.
| 180÷6= | 12.25-0.5= | $\frac{1}{2}$÷0.5= | 202= | 2.5×4= |
| $\frac{1}{3}$+$\frac{1}{4}$= | 0.25×4÷0.25×4= | 3-$\frac{3}{7}$ | 0.13+$\frac{7}{8}$+0.87= | 1-$\frac{3}{8}$+$\frac{5}{8}$ |
| 0.25+$\frac{3}{4}$ | 2÷1%= | $\frac{3}{10}$×$\frac{5}{9}$= | $\frac{3}{4}$+$\frac{1}{5}$= | 0.6÷$\frac{3}{4}$= |
| (1.25+0.3)×0.8= | 10-3.7= | $\frac{9}{11}$×$\frac{3}{4}$×$\frac{11}{9}$= | 1.25×32×2.5= |
15.一件衣服先涨价$\frac{1}{4}$,又打八折优惠,现在的售价( )
| A. | 比原价便宜 | B. | 比原价贵 | C. | 与原价相同 | D. | 无法确定 |
11.用递等式计算.(能简算的要简算)
0 157160 157168 157174 157178 157184 157186 157190 157196 157198 157204 157210 157214 157216 157220 157226 157228 157234 157238 157240 157244 157246 157250 157252 157254 157255 157256 157258 157259 157260 157262 157264 157268 157270 157274 157276 157280 157286 157288 157294 157298 157300 157304 157310 157316 157318 157324 157328 157330 157336 157340 157346 157354 199269
| $\frac{5}{6}$÷$\frac{1}{4}$×$\frac{3}{5}$ | (1-0.8×$\frac{3}{4}$)÷$\frac{4}{5}$ | 884÷34+17×21 |
| 77×$\frac{4}{5}$+23×0.8 | 8-$\frac{2}{3}$÷$\frac{1}{4}$-$\frac{4}{3}$ | 9÷($\frac{7}{9}$-$\frac{2}{3}$)×3 |
| 1.25×3.2×0.25 | ($\frac{4}{5}+\frac{1}{4}$)÷$\frac{7}{3}$+$\frac{3}{10}$ | 4÷5+39×$\frac{4}{5}$ |
| 4.2-1.38+5.8-4.62 | 2÷$\frac{2}{5}$-$\frac{2}{5}$÷2 |