6第一题
在$□$里填上合适的数
$80-30=□0$
$62-18=□4$
$64+6=□0$
$29-17=□2$
$6+27=□3$
$24+42=□6$
$67-30=□7$
$74+18=□2$
$79-58=□1$
$37+18=□5$
$64+8=□2$
$47-19=□8$
$74-27=□7$
$63-25=□8$
$93-37=□6$
$26-16=□0$
$36-23=□3$

5
4
7
1
3
6
3
9
2
5
7
2
4
3
5
1
1

第二题
列竖式计算
$89-47=$
$\begin{array}{r}($ $)\\-($ $)\\\hline($ $)\end{array}$
$85-47=$
$\begin{array}{r}($ $)\\-($ $)\\\hline($ $)\end{array}$
$54-27=$
$\begin{array}{r}($ $)\\-($ $)\\\hline($ $)\end{array}$
$66-39=$

$\begin{array}{r}($ $)\\-($ $)\\\hline($ $)\end{array}$
$46-29=$
$\begin{array}{r}($ $)\\-($ $)\\\hline($ $)\end{array}$
$80-34=$

$\begin{array}{r}($ $)\\-($ $)\\\hline($ $)\end{array}$
$62-27=$
$\begin{array}{r}($ $)\\-($ $)\\\hline($ $)\end{array}$
$41-8=$

$\begin{array}{r}($ $)\\-($ $)\\\hline($ $)\end{array}$

$89 - 47 = 42$
$\begin{array}{r}89\\-47\\\hline42\end{array}$
$85 - 47 = 38$
$\begin{array}{r}85\\-47\\\hline38\end{array}$
$54 - 27 = 27$
$\begin{array}{r}54\\-27\\\hline27\end{array}$
$66 - 39 = 27$
$\begin{array}{r}66\\-39\\\hline27\end{array}$
$46 - 29 = 17$
$\begin{array}{r}46\\-29\\\hline17\end{array}$
$80 - 34 = 46$
$\begin{array}{r}80\\-34\\\hline46\end{array}$
$62 - 27 = 35$
$\begin{array}{r}62\\-27\\\hline35\end{array}$
$41 - 8 = 33$
$\begin{array}{r}41\\-8\\\hline33\end{array}$