10列竖式计算
49 + 30 =
$\begin{array}{|c|c|c|}\hline& & \\\hline\end{array}$
71 - 53 =$\begin{array}{|c|c|c|}$
$\hline$
& & \\
$\hline$
$\end{array}27 + 68 =$

$\begin{array}{|c|c|c|}\hline& & \\\hline\end{array}$
90 - 19 =$\begin{array}{|c|c|c|}$
$\hline$
& & \\
$\hline$
$\end{array}$

49 + 30 =
```
49
+ 30
----
79
```
71 - 53 =
```
71
53
----
18
```
27 + 68 =
```
27
+ 68
----
95
```
90 - 19 =
```
90
19
----
71
```
列式计算
1. $ 30 + 45 = 75 $
2. $ 52 + 48 = 100 $
3. $ 32 - 7 = 25 $
4. $ 56 - 18 = 38 $

列式计算
□ ◯ □ = □
□ ◯ □ = □(元)□ ◯ □ = □(本)
还剩下多少根没运？

□ ◯ □ = □(根)

$8-3=5$(根)