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        <h1>河北版●五年级数学（上册）</h1>
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        <h2>
            3.积的近似值 - 精版答案
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            <div class="answerBox">
	<h4>
		第1题</h4>
	<p>
		(1)0.06　100　10　1000　1</p>
	<p>
		(2)0.03　0.03</p>
</div>
<div class="answerBox">
	<h4>
		第2题</h4>
	<p>
		(1)6.5　6.52　</p>
	<p>
		(2)8.6265　8.6　8.627　</p>
	<p>
		(3)4　4.0　3.98　3.985&nbsp;</p>
	<p>
		(4)5.404　5.395</p>
</div>
<div class="answerBox">
	<h4>
		第3题</h4>
	<p>
		1　0.6　0.57　14　13.8　13.79　1　1.3&nbsp; 1.28</p>
</div>
<div class="answerBox">
	<h4>
		第4题</h4>
	<p>
		5.85&times;5.2&asymp;30(吨)</p>
</div>
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	<h4>
		第5题</h4>
	<p>
		38.6&times;1.3&asymp;50.2(千米)</p>
</div>
<div class="answerBox">
	<h4>
		第6题</h4>
	<p>
		<span style="color:#ff0000;"><strong>分析：</strong></span>3亿中小学生每人节约一张纸，就是300000000张纸。而一张纸的厚度是0.105毫米，300000000张纸叠起来的厚度约是（300000000&times;0.105）毫米。把单位化成米就是把这些纸叠起来放，大约高的米数。</p>
	<p>
		<span style="color:#ff0000;"><strong>解答:</strong></span>3亿=300000000&hellip;&hellip;&hellip;&hellip;（1分）</p>
	<p>
		300000000&times;0.105=31500000（毫米）&hellip;&hellip;&hellip;&hellip;（5分）</p>
	<p>
		31500000毫米=31500米&hellip;&hellip;&hellip;&hellip;（1分）</p>
	<p>
		答：把这些纸叠起来放，约高31500米。&hellip;&hellip;&hellip;&hellip;（1分）</p>
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	&nbsp;</p>

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