4.计算.
0 155582 155590 155596 155600 155606 155608 155612 155618 155620 155626 155632 155636 155638 155642 155648 155650 155656 155660 155662 155666 155668 155672 155674 155676 155677 155678 155680 155681 155682 155684 155686 155690 155692 155696 155698 155702 155708 155710 155716 155720 155722 155726 155732 155738 155740 155746 155750 155752 155758 155762 155768 155776 199269
1-$\frac{2}{5}$-$\frac{3}{5}$ | $\frac{7}{9}$-($\frac{1}{6}$+$\frac{2}{9}$) | 4÷$\frac{2}{3}$÷$\frac{9}{20}$ |
$\frac{5}{8}$-$\frac{1}{4}$÷2 | 98÷($\frac{1}{15}$÷$\frac{2}{7}$) | $\frac{5}{9}$×24+24×$\frac{4}{9}$ |