题目内容
列竖式计算
| 0.58×0.24验算: | 21÷24验算: | 1.57÷3.9(保留两位小数) |
| 3.42×0.25(保留两位小数) | 70.7÷33(商用循环小数表示) |
(1)0.58×0.24=0.1392,
0.58
×
验算:0.58
;
(2)21÷24=0.875,
0.875
0
验算:0.875
×
;
(3)1.57÷3.9≈0.40;
0.4025
(4)3.42×0.25≈0.86,
3.42
;
(5)70.7÷33=2.142
2.1423636…
0.58
×
| 0.24 |
| 232 |
| 116 |
| 0.1392 |
验算:0.58
| 0.24 | 0.1392 |
| 120 |
| 192 |
| 192 |
| 0 |
(2)21÷24=0.875,
0.875
| 24 | 21 |
| 192 |
| 180 |
| 168 |
| 120 |
| 120 |
| 0 |
验算:0.875
×
| 24 |
| 3500 |
| 1750 |
| 21.000 |
(3)1.57÷3.9≈0.40;
0.4025
| 3.9 | 1.57 |
| 156 |
| 100 |
| 78 |
| 210 |
| 195 |
| 15 |
(4)3.42×0.25≈0.86,
3.42
| 0.25 |
| 1710 |
| 684 |
| 0.8550 |
(5)70.7÷33=2.142
| ? |
| 3 |
| ? |
| 6 |
2.1423636…
| 33 | 70.7 |
| 66 |
| 47 |
| 33 |
| 140 |
| 132 |
| 80 |
| 66 |
| 120 |
| 99 |
| 210 |
| 198 |
| 120 |
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