15．在下面每组的横线上填上“＞”、“＜”或“=”．
$\frac{3}{5}$＞$\frac{3}{7}$
$\frac{7}{12}$＜$\frac{5}{6}$
$\frac{4}{5}$＜0.89．
$\frac{3}{5}$＞$\frac{3}{7}$
$\frac{7}{12}$＜$\frac{5}{6}$
$\frac{4}{5}$＜0.89．
13．花店进来了100多花，每6朵扎一束，最多可以扎（ ）束．
0 153508 153516 153522 153526 153532 153534 153538 153544 153546 153552 153558 153562 153564 153568 153574 153576 153582 153586 153588 153592 153594 153598 153600 153602 153603 153604 153606 153607 153608 153610 153612 153616 153618 153622 153624 153628 153634 153636 153642 153646 153648 153652 153658 153664 153666 153672 153676 153678 153684 153688 153694 153702 199269
| A． | 15 | B． | .16 | C． | .17 |