题目内容
列竖式计算后验算
| 1.89÷27 | 0.78×2.5 |
1.89÷27=0.07;
验算:
0.78×2.5=1.95;
验算:
|
| 1 8 9 |
| 0 |
验算:
|
. |
| 1.8 9 |
0.78×2.5=1.95;
|
. |
| 3 9 0 |
| 1 5 6 |
| 1.9 5 0 |
验算:
|
. |
| 2 0 0 |
| 1 7 5 |
| 1.9 5 0 |
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