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4.85×98怎么简便计算?
人气:436 ℃ 时间:2020-06-24 03:13:21
解答
4.85 × 98
= 4.85 × (100 - 2)
= 4.85 × 100 - 4.85 × 2
= 485 - 9.7
= 475.3
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