2算一算
$72 - 2 =$
$45 + 9 =$
$86 - 8 =$
$96 - 2 =$
$24 + 9 =$
$40 - 2 =$
$46 - 9 =$
$43 + 4 =$
$18 - 2 =$
$38 - 8 =$
$35 + 5 =$
$85 + 2 =$
$59 - 4 =$
$78 + 10 =$
$82 - 5 =$
$64 + 6 =$
$32 + 7 =$

1. $72 - 2 = 70$
2. $45 + 9 = 54$
3. $86 - 8 = 78$
4. $96 - 2 = 94$
5. $24 + 9 = 33$
6. $40 - 2 = 38$
7. $46 - 9 = 37$
8. $43 + 4 = 47$
9. $18 - 2 = 16$
10. $38 - 8 = 30$
11. $35 + 5 = 40$
12. $85 + 2 = 87$
13. $59 - 4 = 55$
14. $78 + 10 = 88$
15. $82 - 5 = 77$
16. $64 + 6 = 70$
17. $32 + 7 = 39$

列竖式计算
$46 + 13 =$
$\begin{array}{r}(\quad\quad\quad)\\+(\quad\quad\quad)\\\hline(\quad\quad\quad)\end{array}$
$25 + 61 =$
$\begin{array}{r}(\quad\quad\quad)\\+(\quad\quad\quad)\\\hline(\quad\quad\quad)\end{array}$
$52 + 36 =$
$\begin{array}{r}(\quad\quad\quad)\\+(\quad\quad\quad)\\\hline(\quad\quad\quad)\end{array}$
$42 + 52 =$

$\begin{array}{r}(\quad\quad\quad)\\+(\quad\quad\quad)\\\hline(\quad\quad\quad)\end{array}$
$71 + 28 =$
$\begin{array}{r}(\quad\quad\quad)\\+(\quad\quad\quad)\\\hline(\quad\quad\quad)\end{array}$
$16 + 33 =$

$\begin{array}{r}(\quad\quad\quad)\\+(\quad\quad\quad)\\\hline(\quad\quad\quad)\end{array}$
$65 + 21 =$
$\begin{array}{r}(\quad\quad\quad)\\+(\quad\quad\quad)\\\hline(\quad\quad\quad)\end{array}$
$20 + 75 =$

$\begin{array}{r}(\quad\quad\quad)\\+(\quad\quad\quad)\\\hline(\quad\quad\quad)\end{array}$

$46 + 13 = 59$
$\begin{array}{r}46\\+13\\\hline59\end{array}$
$25 + 61 = 86$
$\begin{array}{r}25\\+61\\\hline86\end{array}$
$52 + 36 = 88$
$\begin{array}{r}52\\+36\\\hline88\end{array}$
$42 + 52 = 94$
$\begin{array}{r}42\\+52\\\hline94\end{array}$
$71 + 28 = 99$
$\begin{array}{r}71\\+28\\\hline99\end{array}$
$16 + 33 = 49$
$\begin{array}{r}16\\+33\\\hline49\end{array}$
$65 + 21 = 86$
$\begin{array}{r}65\\+21\\\hline86\end{array}$
$20 + 75 = 95$
$\begin{array}{r}20\\+75\\\hline95\end{array}$