10.求未知数x.
| 1-$\frac{1}{6}$x=$\frac{1}{2}$ | x:21=$\frac{4}{3}$ | x+30%x=52 |
9.脱式计算.(能简便的要简便)
| ($\frac{5}{8}$+$\frac{4}{9}$)×72 | $\frac{4}{5}$×$\frac{3}{8}$×$\frac{5}{9}$ | $\frac{8}{25}$÷$\frac{1}{24}$+$\frac{8}{25}$ |
| $\frac{4}{3}$×$\frac{1}{3}$+$\frac{2}{3}$×$\frac{3}{4}$ | ($\frac{1}{12}$+$\frac{1}{2}$-$\frac{7}{12}$)÷$\frac{1}{7}$ | 105×($\frac{1}{3}$+$\frac{1}{5}$) |
7.一件商品先提价10%,再降价10%,商品价格会( )
0 153458 153466 153472 153476 153482 153484 153488 153494 153496 153502 153508 153512 153514 153518 153524 153526 153532 153536 153538 153542 153544 153548 153550 153552 153553 153554 153556 153557 153558 153560 153562 153566 153568 153572 153574 153578 153584 153586 153592 153596 153598 153602 153608 153614 153616 153622 153626 153628 153634 153638 153644 153652 199269
| A. | 提高 | B. | 不变 | C. | 降低 |