最新商的近似数课件(人教新课标五年级数学上册课件)1ppt课件

商的近似数课件(人教新课标五年级数学上册课件)1 43.9095保留整数是（      ）43.9095精确到十分位是（      ）43.9095保留两位小数是（      ）43.9095精确到千分位是（      ）用“四舍五入”法求近似数：4443.943.9143.910Evaluationonly.CreatedwithAspose.Slidesfor.NET3.5ClientProfile5.2.0.0.Copyright2004-2011AsposePtyLtd. 现有布料60尺，若做一套衣服需布料16尺，60尺布料可做几套衣服？去尾法：60÷16=3.75因为0.75米布是做不成一套衣服的。所以不能用“四舍五入”法约等于4。只能取近似数3了。Evaluationonly.CreatedwithAspose.Slidesfor.NET3.5ClientProfile5.2.0.0.Copyright2004-2011AsposePtyLtd. 37.3÷2.7的商保留两位小数约是（）A、13.82B、13.80C、13.81CEvaluationonly.CreatedwithAspose.Slidesfor.NET3.5ClientProfile5.2.0.0.Copyright2004-2011AsposePtyLtd. 23.5÷0.91的商（）23.5A、小于B、大于C、等于BEvaluationonly.CreatedwithAspose.Slidesfor.NET3.5ClientProfile5.2.0.0.Copyright2004-2011AsposePtyLtd. 3.6÷1.7≈19÷7≈求商的近似值（保留两位小数）。Evaluationonly.CreatedwithAspose.Slidesfor.NET3.5ClientProfile5.2.0.0.Copyright2004-2011AsposePtyLtd. 有一种油桶，最多能装油2.6千克，要装40千克油，需要这种油桶多少个？Evaluationonly.CreatedwithAspose.Slidesfor.NET3.5ClientProfile5.2.0.0.Copyright2004-2011AsposePtyLtd. 一件衬衫要钉6粒纽扣，现有100粒纽扣，能钉多少件衬衫？Evaluationonly.CreatedwithAspose.Slidesfor.NET3.5ClientProfile5.2.0.0.Copyright2004-2011AsposePtyLtd. 一堆煤重18.5吨，平均每次运2.5吨，一共需运多少次？Evaluationonly.CreatedwithAspose.Slidesfor.NET3.5ClientProfile5.2.0.0.Copyright2004-2011AsposePtyLtd.