7-6人教版二下小博士.ppt

第6课时求10000 以内数的近似数 Evaluation only. Evaluation only. Created with Client Profile . Created with Client Profile . Copyright 2004-2011 Aspose Pty Ltd. Copyright 2004-2011 Aspose Pty Ltd. 。 7×8= 43 ÷7= 54-28= 6 ×(6-2)= 41÷6= 40 ÷(8-3)= 53÷6= (54-45) ×7= 566…… 1 2624 6…… 58 8…… 563 Evaluation only. Evaluation only. Created with Client Profile . Created with Client Profile . Copyright 2004-2011 Aspose Pty Ltd. Copyright 2004-2011 Aspose Pty Ltd. 2. 估一估,填“万”“千”“百”“十”。(1) 一本新华字典大约七( ) 页。(2) 一辆公共汽车大约载客五( ) 人。(3) 一所学校一年级的学生大约有二( ) 名。(4) 体育馆大约能容纳一( ) 人。百十百万 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) 从家到餐厅约有 100 米远。( ) (2) 学校最近购买了 482 把椅子。( ) (3) 学校每个月的水费大约是 5300 元。( ) (4) 某单位 3月份缴纳的水费是 4600 元。( ) √√ Evaluation only. Evaluation only. Created with Client Profile . Created with Client Profile . Copyright 2004-2011 Aspose Pty Ltd. Copyright 2004-2011 Aspose Pty Ltd. [举一反三] 判对错。(1) 光明小学大约有 1567 名学生( ) 。(2)5023 接近 6000 。( ) 【答案】(1) ×(2) × Evaluation only. Evaluation only. Created with Client Profile . Created with Client Profile . Copyright 2004-2011 Aspose Pty Ltd. Copyright 2004-2011 Aspose Pty Ltd. ? 6930________ ; 5023________ ; 3900________ ; 8105________ ; 4008________ ; 2895________ ; 7054________ ; 9009________ 。 7000 5000 4000 8000 4000 3000 7000 9000 Evaluation only. Evaluation only. Created with for