题目内容
竖式计算
| 490+310= | 308×9= | 752×6= | 315×3= |
490+310=800,
490
,
308×9=2772,
308
,
752×6=4512,
752
,
315×3=945,
315
.
490
| +310 |
| 800 |
308×9=2772,
308
| ×9 |
| 2772 |
752×6=4512,
752
| ×6 |
| 4512 |
315×3=945,
315
| ×3 |
| 945 |
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