题目内容
| 估算要注意方法噢! 497×19= | 21×502= | 74×48= | 4825÷82= |
| 7186÷87= | 876÷28= | 5560÷81= | 328×296= |
| 497×19≈10000, | 21×502≈10000, | 74×48≈3500, | 4825÷82≈60, |
| 7186÷87≈80, | 876÷28≈30, | 5560÷81≈70, | 328×296≈90000. |
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题目内容
| 估算要注意方法噢! 497×19= | 21×502= | 74×48= | 4825÷82= |
| 7186÷87= | 876÷28= | 5560÷81= | 328×296= |
| 497×19≈10000, | 21×502≈10000, | 74×48≈3500, | 4825÷82≈60, |
| 7186÷87≈80, | 876÷28≈30, | 5560÷81≈70, | 328×296≈90000. |