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数学
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50又1/3 x 49又2/3 用简便方法计算
人气:270 ℃ 时间:2020-01-27 11:42:12
解答
50又1/3 x 49又2/3
=(50+1/3)×(50-1/3)
=50²-(1/3)²
=2500-1/9
=2499又8/9
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