一、口算。
$27 + 67 =$ $490 - 70 =$ $280 - 70 =$
$80 - 42 =$ $350 + 140 =$ $230 + 540 =$
$29 + 29 =$ $170 + 510 =$ $180 - 50 =$
$47 - 38 =$ $580 - 50 =$ $360 + 220 =$
$11 + 79 =$ $390 - 70 =$ $690 - 60 =$
$70 - 15 =$ $230 + 210 =$ $160 + 630 =$
$76 - 49 =$ $310 + 220 =$ $160 - 80 =$
$16 + 38 =$ $500 + 700 =$ $230 + 270 =$
$27 + 67 =$ $490 - 70 =$ $280 - 70 =$
$80 - 42 =$ $350 + 140 =$ $230 + 540 =$
$29 + 29 =$ $170 + 510 =$ $180 - 50 =$
$47 - 38 =$ $580 - 50 =$ $360 + 220 =$
$11 + 79 =$ $390 - 70 =$ $690 - 60 =$
$70 - 15 =$ $230 + 210 =$ $160 + 630 =$
$76 - 49 =$ $310 + 220 =$ $160 - 80 =$
$16 + 38 =$ $500 + 700 =$ $230 + 270 =$
答案
94 420 210
38 490 770
58 680 130
9 530 580
90 320 630
55 440 790
27 530 80
54 1200 500
38 490 770
58 680 130
9 530 580
90 320 630
55 440 790
27 530 80
54 1200 500
二、用竖式计算。

答案
1. 计算$567 - 335$:
解:
$\begin{array}{r}567\\-335\\\hline232\end{array}$
2. 计算$986 - 873$:
解:
$\begin{array}{r}986\\-873\\\hline113\end{array}$
3. 计算$288 - 76$:
解:
$\begin{array}{r}288\\-76\\\hline212\end{array}$
4. 计算$786 - 562$:
解:
$\begin{array}{r}786\\-562\\\hline224\end{array}$
5. 计算$396 - 85$:
解:
$\begin{array}{r}396\\-85\\\hline311\end{array}$
6. 计算$585 - 262$:
解:
$\begin{array}{r}585\\-262\\\hline323\end{array}$
综上,答案依次为$232$;$113$;$212$;$224$;$311$;$323$。
解:
$\begin{array}{r}567\\-335\\\hline232\end{array}$
2. 计算$986 - 873$:
解:
$\begin{array}{r}986\\-873\\\hline113\end{array}$
3. 计算$288 - 76$:
解:
$\begin{array}{r}288\\-76\\\hline212\end{array}$
4. 计算$786 - 562$:
解:
$\begin{array}{r}786\\-562\\\hline224\end{array}$
5. 计算$396 - 85$:
解:
$\begin{array}{r}396\\-85\\\hline311\end{array}$
6. 计算$585 - 262$:
解:
$\begin{array}{r}585\\-262\\\hline323\end{array}$
综上,答案依次为$232$;$113$;$212$;$224$;$311$;$323$。
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