8.在横线里填上“>”“<”“=”.
20×3<30×3 | 900+1>900×1 | 80+0=80-0 |
989克<1千克 | 67厘米<7分米 | $\frac{2}{7}$<$\frac{5}{7}$ |
3.用你喜欢的方法计算:
$\frac{8}{49}$÷[$\frac{9}{8}$-($\frac{3}{7}$+$\frac{1}{8}$)] | $\frac{5}{4}$-($\frac{3}{7}$+$\frac{1}{4}$) | $\frac{4}{9}×\frac{1}{5}÷\frac{4}{5}$ |
9×($\frac{4}{9}$+$\frac{1}{14}$)+$\frac{5}{14}$ | $\frac{7}{9}$÷$\frac{11}{5}$+$\frac{2}{9}$×$\frac{5}{11}$ | $\frac{11}{10}$-$\frac{1}{4}$-$\frac{3}{4}$+$\frac{9}{10}$ |
2.直接写出得数:
0 158513 158521 158527 158531 158537 158539 158543 158549 158551 158557 158563 158567 158569 158573 158579 158581 158587 158591 158593 158597 158599 158603 158605 158607 158608 158609 158611 158612 158613 158615 158617 158621 158623 158627 158629 158633 158639 158641 158647 158651 158653 158657 158663 158669 158671 158677 158681 158683 158689 158693 158699 158707 199269
$\frac{3}{2}$÷$\frac{1}{2}$×2= | $\frac{8}{7}$×$\frac{7}{8}$×$\frac{14}{15}$= | $\frac{8}{9}$×0.1+0.9×$\frac{8}{9}$= |
$\frac{4}{5}$×$\frac{16}{19}$+$\frac{16}{19}$×$\frac{1}{5}$= | $\frac{1}{7}$+$\frac{6}{7}$×7= | $\frac{1}{3}$×$\frac{1}{4}$÷$\frac{1}{3}$×$\frac{1}{4}$= |