题目内容
口算下列各题.
| 72×60= | 250×40= | 73×20= | 75×40= |
| 81×50= | 15×4= | 43×200= | 75×500= |
| 600×50= | 70×40= | 92×50= | 30×14= |
| 59×42≈ | 32×61≈ | 993×19≈ | 701×289≈ |
| 72×60=4320; | 250×40=10000; | 73×20=1460; | 75×40=3000; |
| 81×50=4050; | 15×4=60; | 43×200=8600; | 75×500=37500; |
| 600×50=30000; | 70×40=2800; | 92×50=4600; | 30×14=420; |
| 59×42≈2400; | 32×61≈1800; | 993×19≈20000; | 701×289≈210000; |
练习册系列答案
相关题目