四、用竖式计算，带 * 的要验算。
77 + 162              285 - 93            * 266 + 257
568 - 376             337 + 366          * 622 - 467
721 - 456              269 + 926          * 703 - 445
163 - 88 + 226       490 - 263 - 78       28 + 109 + 336
523 - 239 - 87        347 + 89 - 266        152 - 77 + 209

解：
1. $77+162=239$
$\begin{array}{r}77 \\+162 \\\hline239\end{array}$
2. $285-93=192$
$\begin{array}{r}285 \\-93 \\\hline192\end{array}$
3. *$266+257=523$
$\begin{array}{r}266 \\+257 \\\hline523\end{array}$
验算：$\begin{array}{r}523 \\-257 \\\hline266\end{array}$
4. $568-376=192$
$\begin{array}{r}568 \\-376 \\\hline192\end{array}$
5. $337+366=703$
$\begin{array}{r}337 \\+366 \\\hline703\end{array}$
6. *$622-467=155$
$\begin{array}{r}622 \\-467 \\\hline155\end{array}$
验算：$\begin{array}{r}155 \\+467 \\\hline622\end{array}$
7. $721-456=265$
$\begin{array}{r}721 \\-456 \\\hline265\end{array}$
8. $269+926=1195$
$\begin{array}{r}269 \\+926 \\\hline1195\end{array}$
9. *$703-445=258$
$\begin{array}{r}703 \\-445 \\\hline258\end{array}$
验算：$\begin{array}{r}258 \\+445 \\\hline703\end{array}$
10. $163-88+226=301$
$\begin{array}{r}163 \\-88 \\\hline75 \\+226 \\\hline301\end{array}$
11. $490-263-78=149$
$\begin{array}{r}490 \\-263 \\\hline227 \\-78 \\\hline149\end{array}$
12. $28+109+336=473$
$\begin{array}{r}28 \\+109 \\\hline137 \\+336 \\\hline473\end{array}$
13. $523-239-87=197$
$\begin{array}{r}523 \\-239 \\\hline284 \\-87 \\\hline197\end{array}$
14. $347+89-266=170$
$\begin{array}{r}347 \\+89 \\\hline436 \\-266 \\\hline170\end{array}$
15. $152-77+209=284$
$\begin{array}{r}152 \\-77 \\\hline75 \\+209 \\\hline284\end{array}$