1.计算题,能简算的就简算.
1-$\frac{5}{7}$×$\frac{21}{25}$ | $\frac{4}{9}$×$\frac{3}{4}$÷$\frac{2}{5}$ | ($\frac{1}{4}$+$\frac{2}{9}$)×36 | $\frac{5}{6}$÷$\frac{2}{3}$÷$\frac{6}{5}$ |
$\frac{2}{9}$×$\frac{5}{34}$÷$\frac{2}{3}$ | $\frac{8}{9}$÷$\frac{20}{27}$÷$\frac{5}{28}$ | $\frac{13}{22}$÷($\frac{43}{44}$-$\frac{1}{11}$) | 2$\frac{1}{5}$÷3$\frac{2}{3}$ |
15.一本书100页,小红看了20%,求剩下的页数,列式为( )
A. | 100-20% | B. | 100×(1-20%) | C. | 100×20% |
14.一件商品打八折后按50元销售,原价是( )元.
0 159631 159639 159645 159649 159655 159657 159661 159667 159669 159675 159681 159685 159687 159691 159697 159699 159705 159709 159711 159715 159717 159721 159723 159725 159726 159727 159729 159730 159731 159733 159735 159739 159741 159745 159747 159751 159757 159759 159765 159769 159771 159775 159781 159787 159789 159795 159799 159801 159807 159811 159817 159825 199269
A. | 40 | B. | 60 | C. | 62.5 |