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1. 直接写出得数。
$0.45×2=$
$4.25×2=$
$5.15÷2=$
$27÷0.3=$
$8×3.14=$
$3.14×0.2=$
$0÷3.14=$
$\frac{7}{9}÷2=$
$\frac{11}{12}÷\frac{5}{6}=$
$\frac{7}{8}÷\frac{1}{4}=$
$\frac{16}{7}÷\frac{4}{5}=$
$\frac{7}{10}÷0.8=$
$9÷\frac{3}{4}=$
$\frac{3}{8}÷\frac{3}{14}=$
$\frac{7}{25}÷\frac{7}{10}=$
$\frac{5}{9}÷\frac{1}{27}=$
$\frac{2}{7}÷\frac{4}{3}=$
$\frac{1}{2}×\frac{3}{4}÷\frac{3}{4}×\frac{1}{2}=$
$\frac{4}{9}÷16=$
$20÷\frac{5}{7}=$
$\frac{5}{14}÷\frac{5}{7}×\frac{5}{7}=$
$0.45×2=$
$4.25×2=$
$5.15÷2=$
$27÷0.3=$
$8×3.14=$
$3.14×0.2=$
$0÷3.14=$
$\frac{7}{9}÷2=$
$\frac{11}{12}÷\frac{5}{6}=$
$\frac{7}{8}÷\frac{1}{4}=$
$\frac{16}{7}÷\frac{4}{5}=$
$\frac{7}{10}÷0.8=$
$9÷\frac{3}{4}=$
$\frac{3}{8}÷\frac{3}{14}=$
$\frac{7}{25}÷\frac{7}{10}=$
$\frac{5}{9}÷\frac{1}{27}=$
$\frac{2}{7}÷\frac{4}{3}=$
$\frac{1}{2}×\frac{3}{4}÷\frac{3}{4}×\frac{1}{2}=$
$\frac{4}{9}÷16=$
$20÷\frac{5}{7}=$
$\frac{5}{14}÷\frac{5}{7}×\frac{5}{7}=$
答案
0.9 8.5 2.575 90 25.12 0.628 0
$\frac{7}{18}$ $\frac{11}{10}$ $\frac{7}{2}$ $\frac{20}{7}$ $\frac{7}{8}$ 12 $\frac{7}{4}$ $\frac{2}{5}$ 15
$\frac{3}{14}$ $\frac{1}{4}$ $\frac{1}{36}$ 28 $\frac{5}{14}$
$\frac{7}{18}$ $\frac{11}{10}$ $\frac{7}{2}$ $\frac{20}{7}$ $\frac{7}{8}$ 12 $\frac{7}{4}$ $\frac{2}{5}$ 15
$\frac{3}{14}$ $\frac{1}{4}$ $\frac{1}{36}$ 28 $\frac{5}{14}$
2. 写出下列图形的对称轴数量。
| 图形 | | |
| | |
| --- | --- | --- | --- | --- | --- |
| 对称轴数量/条 |
| 图形 | | |
| | || --- | --- | --- | --- | --- | --- |
| 对称轴数量/条 |
无数
| 1
| 4
| 3
| 3
|答案
无数 1 4 3 3
3. 递等式计算。
$\frac{2}{9}÷(\frac{4}{5}+\frac{2}{3})$
$36×(\frac{3}{4}+\frac{1}{6}-\frac{2}{3})$
$4.5+4.34+5.5+2.66$
$16.75-(2.3+6.75)$
$\frac{2}{9}÷(\frac{4}{5}+\frac{2}{3})$
$36×(\frac{3}{4}+\frac{1}{6}-\frac{2}{3})$
$4.5+4.34+5.5+2.66$
$16.75-(2.3+6.75)$
答案
$\frac{5}{33}$ 9 17 7.7
