《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. Created with Aspose.Slides for .NET 3.5 Client Profile 5.2.0.0. Copyright 2004-2011 Aspose Pty Ltd. 1.天天口算。 7×8= 43÷7= 54-28= 6×(6-2)= 41÷6= 40÷(8-3)= 53÷6= (54-45)×7= 56 6……1 26 24 6……5 8 8……5 63 Evaluation only. Created with Aspose.Slides for .NET 3.5 Client Profile 5.2.0.0. 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. Created with Aspose.Slides for .NET 3.5 Client Profile 5.2.0.0. Copyright 2004-2011 Aspose Pty Ltd. 3.在近似数数据的后面画“√”。 (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. Created with Aspose.Slides for .NET 3.5 Client Profile 5.2.0.0. 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. Created with Aspose.Slides for .NET 3.5 Client Profile 5.2.0.0. Copyright 2004-2011 Aspose Pty Ltd. 4.下面的数各接近几千？ 6930________； 5023________； 3900________； 8105________； 4008________； 2895________； 7054________； 9009________。 7000 5000 4000 8000 4000 3000 7000 9000 Evaluation only. Created with Aspose.Slides for .NET 3.5 Client Profile 5.2.0.0. Copyright 2004-2011 Aspose Pty Ltd. 5.在最接近的数的后面打“√”。 √ √ Evaluation only. Created with Aspose.Slides for .NET 3.5 Client Profile 5.2.0.0. Copyright 2004-2011 Aspose Pty Ltd. 6.一台电视的价格是2908元，约是多少元？ 可以看成整千数，约是( )元，也可以看成是整百数，约是 ( )元，还能看成是整十数，约是( )。 3000 2900 2910 Evaluation only. Created with Aspose.Slides for .NET 3.5 Client Profile 5.2.0.0. Copyright 2004-2011 Aspose Pty Ltd. 7.鸟儿回家。(连一连) Evaluation only. Created with Aspose.Slides for .NET 3.5 Client Profile 5.2.0.0. Copyright 2004-2011 Aspose Pty Ltd. 8.想一想，在空格里填上对应小学的名称。 实验小学 益智小学 平安小学 Evaluation only. Created