16.怎样简便就怎样算.
| 2-$\frac{4}{9}$×$\frac{3}{8}$-$\frac{5}{6}$ | $\frac{1}{15}$×($\frac{3}{8}$-$\frac{1}{6}$)×24 | $\frac{4}{5}$×$\frac{2}{3}$+$\frac{2}{3}$×$\frac{6}{5}$ |
| 2011×$\frac{2011}{2012}$ | ($\frac{5}{12}$+$\frac{3}{5}$)×12×5 | $\frac{8}{29}$×$\frac{1}{7}$×29+$\frac{6}{7}$ |
15.直接写出得数.
| 3.72+2.8= | 1.6×$\frac{5}{8}$= | $\frac{11}{18}$×$\frac{38}{55}$= | 12×$\frac{3}{16}$= |
| $\frac{9}{10}$×25= | 1-$\frac{3}{4}$×$\frac{2}{3}$= | 1-$\frac{2}{5}$+$\frac{3}{5}$= | $\frac{4}{7}$+$\frac{3}{7}$×21= |
14.一道减法算式中,减数相当于被减数的$\frac{4}{5}$,差是减数的( )
| A. | $\frac{4}{5}$ | B. | $\frac{1}{5}$ | C. | $\frac{1}{4}$ |
13.与$\frac{3}{4}$的$\frac{5}{6}$最接近的是( )
| A. | $\frac{1}{2}$ | B. | $\frac{3}{8}$ | C. | $\frac{1}{4}$ | D. | $\frac{1}{8}$ |
11.下面算式中,计算结果最小的是( )
0 145599 145607 145613 145617 145623 145625 145629 145635 145637 145643 145649 145653 145655 145659 145665 145667 145673 145677 145679 145683 145685 145689 145691 145693 145694 145695 145697 145698 145699 145701 145703 145707 145709 145713 145715 145719 145725 145727 145733 145737 145739 145743 145749 145755 145757 145763 145767 145769 145775 145779 145785 145793 199269
| A. | $\frac{2}{3}$×$\frac{3}{8}$ | B. | $\frac{2}{3}$×$\frac{3}{7}$ | C. | $\frac{2}{3}$×$\frac{5}{3}$ |