问题
解答题
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答案
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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497×19≈10000, | 21×502≈10000, | 74×48≈3500, | 4825÷82≈60, |
7186÷87≈80, | 876÷28≈30, | 5560÷81≈70, | 328×296≈90000. |