用四舍五入法,按括号里的要求对下列各数取近似值,并说出它的精确度(或有效数字)(1)26074(精确到千位)(2)7049(保留2个有效数字)(3)26074000000(精确到亿位)(4)704.9(保留3个
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![用四舍五入法,按括号里的要求对下列各数取近似值,并说出它的精确度(或有效数字)(1)26074(精确到千位)(2)7049(保留2个有效数字)(3)26074000000(精确到亿位)(4)704.9(保留3个](/uploads/image/z/3888436-4-6.jpg?t=%E7%94%A8%E5%9B%9B%E8%88%8D%E4%BA%94%E5%85%A5%E6%B3%95%2C%E6%8C%89%E6%8B%AC%E5%8F%B7%E9%87%8C%E7%9A%84%E8%A6%81%E6%B1%82%E5%AF%B9%E4%B8%8B%E5%88%97%E5%90%84%E6%95%B0%E5%8F%96%E8%BF%91%E4%BC%BC%E5%80%BC%2C%E5%B9%B6%E8%AF%B4%E5%87%BA%E5%AE%83%E7%9A%84%E7%B2%BE%E7%A1%AE%E5%BA%A6%EF%BC%88%E6%88%96%E6%9C%89%E6%95%88%E6%95%B0%E5%AD%97%EF%BC%89%EF%BC%881%EF%BC%8926074%EF%BC%88%E7%B2%BE%E7%A1%AE%E5%88%B0%E5%8D%83%E4%BD%8D%EF%BC%89%EF%BC%882%EF%BC%897049%EF%BC%88%E4%BF%9D%E7%95%992%E4%B8%AA%E6%9C%89%E6%95%88%E6%95%B0%E5%AD%97%EF%BC%89%EF%BC%883%EF%BC%8926074000000%EF%BC%88%E7%B2%BE%E7%A1%AE%E5%88%B0%E4%BA%BF%E4%BD%8D%EF%BC%89%EF%BC%884%EF%BC%89704.9%EF%BC%88%E4%BF%9D%E7%95%993%E4%B8%AA)
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