13.
| 直接写得数 $\frac{16}{17}$÷8= | $\frac{3}{4}$×16= | 1÷$\frac{9}{7}$= | $\frac{2}{3}$×$\frac{1}{2}$×6= | $\frac{1}{7}$÷$\frac{1}{14}$= |
| 0÷$\frac{7}{11}$= | 7×$\frac{3}{14}$= | 1÷$\frac{1}{9}$×9= | $\frac{7}{24}$×$\frac{3}{14}$= | $\frac{3}{8}$×$\frac{2}{3}$= |
| $\frac{2}{3}$÷$\frac{4}{9}$= | $\frac{4}{7}$-$\frac{4}{7}$×1= |
10.如果a是大于0,且小于1的数,那么( )的结果最大.
| A. | a2 | B. | $\frac{1}{2}$a | C. | 1÷a |
9.表示x和y成正比例关系的式子是( )
| A. | x=6y | B. | xy=6 | C. | x-y=6 |
8.x=3是( )的解.
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| A. | 2x+3=5 | B. | 8-x=6 | C. | 10+2x=16 |