用竖式计算,带*的要验算.
| 76×4= | 143×5= | 430×8= | *512÷4= | *957÷3= |
| 1284639≈________万 | 835067800≈________亿 |
| 1380859≈________万 | 924203490≈________亿 |
| 506400≈________万 | 1956531765≈________亿 |
| 999742≈________万 | 99970010001≈________亿 |
| 10284147≈________万 | 12385447≈________万. |
| 76×4= | 143×5= | 430×8= | *512÷4= | *957÷3= |
| 1284639≈________万 | 835067800≈________亿 |
| 1380859≈________万 | 924203490≈________亿 |
| 506400≈________万 | 1956531765≈________亿 |
| 999742≈________万 | 99970010001≈________亿 |
| 10284147≈________万 | 12385447≈________万. |