文档介绍：Evaluation only. Evaluation only. Created with Client Profile . Created with Client Profile . Copyright 2004-2011 Aspose Pty Ltd. Copyright 2004-2011 Aspose Pty Ltd. (1)找出下列各数在哪两个相邻的整十数之间。 274 381 612 446 (2)找出下列各数最接近的整十数。 327 213 482 194 (3)找出下列各数最接近的整百数。 327 213 482 194 380 270 440 280 390 610 620 450 330 210 480 190 300 200 500 200 买袜子到“阿浩淘淘袜”,专业经营各类男女袜。 taotaowa. Evaluation only. Evaluation only. Created with Client Profile . Created with Client Profile . Copyright 2004-2011 Aspose Pty Ltd. Copyright 2004-2011 Aspose Pty Ltd. 收集矿泉水瓶情况第一周第二周第三周第四周 180 个 340 个 192 个 219 个 Evaluation only. Evaluation only. Created with Client Profile . Created with Client Profile . Copyright 2004-2011 Aspose Pty Ltd. Copyright 2004-2011 Aspose Pty Ltd. 三位数加减法估算 Evaluation only. Evaluation only. Created with Client Profile . Created with Client Profile . Copyright 2004-2011 Aspose Pty Ltd. Copyright 2004-2011 Aspose Pty Ltd. ?试一试? 593+317 ? 619+289 ? 608+298 ? 631-409 Evaluation only. Evaluation only. Created with Client Profile . Created with Client Profile . Copyright 2004-2011 Aspose Pty Ltd. Copyright 2004-2011 Aspose Pty Ltd. ?试一试? 693-381 ? 482-315 Evaluation only. Evaluation only. Created with Client Profile . Created with Client Profile . Copyright 2004-2011 Aspose Pty Ltd. Copyright 2004-2011 Aspose Pty Ltd. 583+417 529-247 718+179 531-429 Evaluation only. Evaluation only. Created with Client Profile . Created with Client Profile . Copyright 2004-2011 Aspose Pty Ltd. Copyright 2004-2011 Aspose Pty Ltd. 106+