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	<title>Kuriositate Matematikoak</title>
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		<title>Kuriositate Matematikoak</title>
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		<item>
		<title>Zenbakiekin jolasten (1)!</title>
		<link>http://jakinmate.wordpress.com/2010/02/23/zenbakiekin-jolasten-1-2/</link>
		<comments>http://jakinmate.wordpress.com/2010/02/23/zenbakiekin-jolasten-1-2/#comments</comments>
		<pubDate>Tue, 23 Feb 2010 18:21:39 +0000</pubDate>
		<dc:creator>jrcf</dc:creator>
				<category><![CDATA[Soluzioak]]></category>

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		<description><![CDATA[Prozedura azaltzeko kalkulua algebraikoa erabiliko dut. Izan bedi hiru zifratako zenbaki bat: xyz . Zenbaki bera jarraian idazterakoan lortzen da: xyzxyz. Hau da, 105.x+104.y+103.z+102.x+10.y+z = (105+102).x+(104+10).y+(103+1).z = x.102(103+1)+y.10.(103+1)+z.(103+1) = (102.x+10.y+z). 1001 Emaitza beti izango da pentsatutako zenbakia bider 1001. 1.001 zenbakiaren deskonposaketa eginez zera lortzen da  1.001 = 7.11.13 dela. Hori dela eta zera esan [...]<img alt="" border="0" src="http://stats.wordpress.com/b.gif?host=jakinmate.wordpress.com&amp;blog=11321139&amp;post=40&amp;subd=jakinmate&amp;ref=&amp;feed=1" width="1" height="1" />]]></description>
			<content:encoded><![CDATA[<p>Prozedura azaltzeko kalkulua algebraikoa erabiliko dut.</p>
<p>Izan bedi hiru zifratako zenbaki bat: xyz . Zenbaki bera jarraian idazterakoan lortzen da: xyzxyz. Hau da,</p>
<p>10<sup>5</sup>.x+10<sup>4</sup>.y+10<sup>3</sup>.z+10<sup>2</sup>.x+10.y+z = (10<sup>5</sup>+10<sup>2</sup>).x+(10<sup>4</sup>+10).y+(10<sup>3</sup>+1).z = x.10<sup>2</sup>(10<sup>3</sup>+1)+y.10.(10<sup>3</sup>+1)+z.(10<sup>3</sup>+1) = (10<sup>2</sup>.x+10.y+z). 1001</p>
<p>Emaitza beti izango da pentsatutako zenbakia bider 1001.</p>
<p>1.001 zenbakiaren deskonposaketa eginez zera lortzen da  1.001 = 7.11.13 dela.</p>
<p>Hori dela eta zera esan dezakegu:  <span style="color:#003300;"><strong>xyzxyz : 1001 = xyz</strong></span> dela.</p>
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		<slash:comments>1</slash:comments>
	
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			<media:title type="html">jrcf</media:title>
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		<title>Zenbakiekin jolasten (1)</title>
		<link>http://jakinmate.wordpress.com/2010/02/23/zenbakiekin-jolasten-1/</link>
		<comments>http://jakinmate.wordpress.com/2010/02/23/zenbakiekin-jolasten-1/#comments</comments>
		<pubDate>Tue, 23 Feb 2010 18:21:15 +0000</pubDate>
		<dc:creator>jrcf</dc:creator>
				<category><![CDATA[Kuriositatea]]></category>

		<guid isPermaLink="false">http://jakinmate.wordpress.com/?p=38</guid>
		<description><![CDATA[Beste joko bat proposatzen dizut: Pentsatu hiru zifrako zenbaki bat eta idatz ezazu. Idatzi zenbaki bera aurrekoaren jarraian eta, sei zifrako zenbaki bat lortuko duzu. Eragiketa eginez, froga ezazu lortutako zenbakia zazpiren multiploa den. Froga ezazu aurreko eragiketan lortutako zatidura 11-ren multiploa den (egin zatiketa). Eta azkenik, aurreko eragiketan lortutako zatidura zatitu 13 zenbakiarekin. Azken [...]<img alt="" border="0" src="http://stats.wordpress.com/b.gif?host=jakinmate.wordpress.com&amp;blog=11321139&amp;post=38&amp;subd=jakinmate&amp;ref=&amp;feed=1" width="1" height="1" />]]></description>
			<content:encoded><![CDATA[<p>Beste joko bat proposatzen dizut:</p>
<ul>
<li>Pentsatu hiru zifrako zenbaki bat eta idatz ezazu.</li>
<li>Idatzi zenbaki bera aurrekoaren jarraian eta, sei zifrako zenbaki bat lortuko duzu.</li>
<li>Eragiketa eginez, froga ezazu lortutako zenbakia zazpiren multiploa den.</li>
<li>Froga ezazu aurreko eragiketan lortutako zatidura 11-ren multiploa den (egin zatiketa).</li>
<li>Eta azkenik, aurreko eragiketan lortutako zatidura zatitu 13 zenbakiarekin.</li>
</ul>
<p>Azken zatiduran lortutako zenbakia da zuk hasieran pentsatu duzuna?</p>
<p>Arrazoitu zergatia.</p>
<p><a href="http://jakinmate.wordpress.com/2010/02/23/zenbakiekin-jolasten-1-2/" target="_blank">Ikusi erantzuna</a></p>
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			<media:title type="html">jrcf</media:title>
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		<title>Zenbakiekin jolasten!</title>
		<link>http://jakinmate.wordpress.com/2010/02/17/zenbakiekin-jolasten-2/</link>
		<comments>http://jakinmate.wordpress.com/2010/02/17/zenbakiekin-jolasten-2/#comments</comments>
		<pubDate>Wed, 17 Feb 2010 18:20:51 +0000</pubDate>
		<dc:creator>jrcf</dc:creator>
				<category><![CDATA[Soluzioak]]></category>

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		<description><![CDATA[Kalkulu algebraikoa erabiliz frogatuko dut. Izan bedi hiru zifra desberdin dituen zenbakia: xyz = 102.x+10.y+z eta alderantzizko ordenan zyx=102.z+10.y+x Suposatuz x&#62;z dela, egin zenbakien arteko kenketa: (102.x+10.y+z)-(102.z+10.y+x)= 102.(x-z)+(z-x) =102.(x-z)-(x-z) = (x-z).99 Edo, suposatuz z&#62;x dela, egin zenbakien arteko kenketa: (102.z+10.y+x)-(102.x+10.y+z)= 102.(z-x)+(x-z) =102.(z-x)-(z-x) = (z-x).99 Hau da, hiru zifra desberdin dituen zenbakia ken bere alderantzizko ordena [...]<img alt="" border="0" src="http://stats.wordpress.com/b.gif?host=jakinmate.wordpress.com&amp;blog=11321139&amp;post=35&amp;subd=jakinmate&amp;ref=&amp;feed=1" width="1" height="1" />]]></description>
			<content:encoded><![CDATA[<p>Kalkulu algebraikoa erabiliz frogatuko dut.</p>
<p>Izan bedi hiru zifra desberdin dituen zenbakia: xyz = 10<sup>2</sup>.x+10.y+z eta alderantzizko ordenan zyx=10<sup>2</sup>.z+10.y+x</p>
<p>Suposatuz x&gt;z dela, egin zenbakien arteko kenketa: (10<sup>2</sup>.x+10.y+z)-(10<sup>2</sup>.z+10.y+x)= 10<sup>2</sup>.(x-z)+(z-x) =10<sup>2</sup>.(x-z)-(x-z) = (x-z).99<br />
Edo, suposatuz z&gt;x dela, egin zenbakien arteko kenketa: (10<sup>2</sup>.z+10.y+x)-(10<sup>2</sup>.x+10.y+z)= 10<sup>2</sup>.(z-x)+(x-z) =10<sup>2</sup>.(z-x)-(z-x) = (z-x).99</p>
<p>Hau da, hiru zifra desberdin dituen zenbakia ken bere alderantzizko ordena duenak beti ematen du 99-ren multiploa den zenbaki bat. Eta nolakoak dira multiplo horiek? Ikus ditzagun:<br />
1.99 = 99 = 099<br />
2.99 = 198<br />
3.99 = 297<br />
4.99= 396<br />
&#8230;</p>
<p>Ohartu zaitez guztiak dituztela propietate berdinak:</p>
<ul>
<li>Hamarreko zifra beti da 9</li>
<li>Unitateetako eta ehuneko zifren batura beti da bederatzi</li>
</ul>
<p>Guzti hori dela eta, ikus dezakezu nahikoa dela unitateetako (edo ehuneko) zifra ezagutzearekin, besteak zeintzuk diren jakiteko.</p>
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			<media:title type="html">jrcf</media:title>
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		<title>Zenbakiekin jolasten</title>
		<link>http://jakinmate.wordpress.com/2010/02/17/zenbakiekin-jolasten/</link>
		<comments>http://jakinmate.wordpress.com/2010/02/17/zenbakiekin-jolasten/#comments</comments>
		<pubDate>Wed, 17 Feb 2010 18:20:25 +0000</pubDate>
		<dc:creator>jrcf</dc:creator>
				<category><![CDATA[Kuriositatea]]></category>

		<guid isPermaLink="false">http://jakinmate.wordpress.com/?p=33</guid>
		<description><![CDATA[Joko bat proposatzen dizut: Hiru zifra desberdin dituen zenbaki bat idatz ezazu. (136, adibidez) Aukeratutako zenbakia alderantzizko ordenan idatz ezazu. (631) Zenbaki handienari kendu txikiena. (631-136=495) Eta, unitateetako zefra ematen badidazu, nik kenketaren emaitza zein den ezango dizut. Hori nola da posible? Eman azalpen idatzia. Aukeratutako edozein hiru zifra desberdin dituen zenbakiekin gertatzen da edo [...]<img alt="" border="0" src="http://stats.wordpress.com/b.gif?host=jakinmate.wordpress.com&amp;blog=11321139&amp;post=33&amp;subd=jakinmate&amp;ref=&amp;feed=1" width="1" height="1" />]]></description>
			<content:encoded><![CDATA[<p><img class="alignleft" src="http://t1.gstatic.com/images?q=tbn:vXkNslFuOLbYEM:http://sferrerobravo.files.wordpress.com/2007/11/numeros.jpg" alt="" width="119" height="108" />Joko bat proposatzen dizut:</p>
<ul>
<li>Hiru zifra desberdin dituen zenbaki bat idatz ezazu. (136, adibidez)</li>
<li>Aukeratutako zenbakia alderantzizko ordenan idatz ezazu. (631)</li>
<li>Zenbaki handienari kendu txikiena. (631-136=495)</li>
<li>Eta, unitateetako zefra ematen badidazu, nik kenketaren emaitza zein den ezango dizut.</li>
</ul>
<p>Hori nola da posible? Eman azalpen idatzia.</p>
<p>Aukeratutako edozein hiru zifra desberdin dituen zenbakiekin gertatzen da edo batzuekin bakarrik? Zergatik</p>
<p><a href="http://jakinmate.wordpress.com/2010/02/17/zenbakiekin-jolasten-2/" target="_blank">Ikusi erantzuna</a></p>
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		<title>Protegido: Adinak!</title>
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		<pubDate>Thu, 11 Feb 2010 18:19:53 +0000</pubDate>
		<dc:creator>jrcf</dc:creator>
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		<title>Adinak</title>
		<link>http://jakinmate.wordpress.com/2010/02/11/adinak/</link>
		<comments>http://jakinmate.wordpress.com/2010/02/11/adinak/#comments</comments>
		<pubDate>Thu, 11 Feb 2010 18:18:45 +0000</pubDate>
		<dc:creator>jrcf</dc:creator>
				<category><![CDATA[Orokorra]]></category>

		<guid isPermaLink="false">http://jakinmate.wordpress.com/?p=23</guid>
		<description><![CDATA[Azpaldian elkar ikusi gabeko bi lagun (Jon eta Kepa) elkarrizketan ari dira. Jonek Kepari galdetzen dio: Eta zure hiru semeetariko bakoitzak zein adin du? Kepak erantzun: Begira, dituzten adinen zenbakiak biderkatzerakoan 36 ematen du eta, gainera, adin horien batura hor aurrean duzun etxeak duen zenbaki bera da. Aldiune bat igaro ondoren Jonek esaten dio: Adinak [...]<img alt="" border="0" src="http://stats.wordpress.com/b.gif?host=jakinmate.wordpress.com&amp;blog=11321139&amp;post=23&amp;subd=jakinmate&amp;ref=&amp;feed=1" width="1" height="1" />]]></description>
			<content:encoded><![CDATA[<p>Azpaldian elkar ikusi gabeko bi lagun (Jon eta Kepa) elkarrizketan ari dira.</p>
<ul>
<li>Jonek Kepari galdetzen dio: Eta zure hiru semeetariko bakoitzak zein adin du?</li>
<li>Kepak erantzun: Begira, dituzten adinen zenbakiak biderkatzerakoan 36 ematen du eta, gainera, adin horien batura hor aurrean duzun etxeak duen zenbaki bera da.</li>
<li>Aldiune bat igaro ondoren Jonek esaten dio: Adinak kalkulatzeko datu bat falta zait.</li>
<li>Eta Kepak erantzun: Ah, egia da! Nagusiak pianoa jotzen du.</li>
</ul>
<p>Jakingo zenuke, era arrazoitu batean,  hiru semeen adinak kalkulatzen?</p>
<p><a href="http://jakinmate.wordpress.com/2010/02/11/adinak-2/" target="_blank">Erantzuna ikusi</a><br />
<strong><span style="font-family:Comic Sans MS;color:#ff0000;"><span style="color:#000000;"><strong></strong></span></span></strong></p>
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			<media:title type="html">jrcf</media:title>
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		<title>Zenbakiak deskonposatu</title>
		<link>http://jakinmate.wordpress.com/2010/01/08/hola-mundo/</link>
		<comments>http://jakinmate.wordpress.com/2010/01/08/hola-mundo/#comments</comments>
		<pubDate>Fri, 08 Jan 2010 19:11:49 +0000</pubDate>
		<dc:creator>jrcf</dc:creator>
				<category><![CDATA[Kuriositatea]]></category>

		<guid isPermaLink="false"></guid>
		<description><![CDATA[Matematikarientzat denbora-pasa garrantsitsuenetariko bat zenbaki konkretu bat hartu eta forma desberdinetan deskonposatzea da. Bazenekien 1.729 zenbakia, bi zenbaki ber hiru egin ondoren batura bezala deskonposatzen den lehen zenbakia dela eta, horretarako bi forma desberdin daudela? Hain zuzen, 1.729=103+93=123+13 Orain ikus dezagun zein trebea zareen zenbakiekin. Horra hor proposamen batzuk: Jakingo zenuke 10 zenbakia bi forma [...]<img alt="" border="0" src="http://stats.wordpress.com/b.gif?host=jakinmate.wordpress.com&amp;blog=11321139&amp;post=1&amp;subd=jakinmate&amp;ref=&amp;feed=1" width="1" height="1" />]]></description>
			<content:encoded><![CDATA[<p>Matematikarientzat denbora-pasa garrantsitsuenetariko bat zenbaki konkretu bat hartu eta forma desberdinetan deskonposatzea da.</p>
<p style="text-align:left;"><span style="color:#000000;">Bazenekien 1.729 zenbakia, bi zenbaki ber hiru egin ondoren batura bezala deskonposatzen den lehen zenbakia dela eta, horretarako bi forma desberdin daudela?</span></p>
<p style="text-align:justify;"><span style="font-family:Comic Sans MS;color:#ff0000;"><span style="color:#000000;">Hain zuzen, 1.729=10<sup>3</sup>+9<sup>3</sup>=12<sup>3</sup>+1<sup>3</sup></span></span></p>
<p style="text-align:justify;"><span style="color:#000000;">Orain ikus dezagun zein trebea zareen zenbakiekin. Horra hor proposamen batzuk:</span></p>
<ol>
<li><span style="color:#000000;">Jakingo zenuke 10 zenbakia bi forma desberdinetan idazten, baina bakarrik </span><span style="color:#000000;">lau bereratzi </span><span style="color:#000000;">erabilita?</span></li>
<li><span style="color:#000000;">Jakingo zenuke 100 zenbakia lau forma desberdinetan idazten bost zifra berdin erabilita?<br />
Adibidea: 100=111-11</span></li>
<li><span style="color:#000000;">Idatz dezakezu 30 zenbakia hiru hirurekin? Eta hiru seirekin? Eta hiru bostekin?<br />
</span></li>
</ol>
<p><span style="color:#000000;"><strong><a href="http://jakinmate.wordpress.com/2009/12/07/zenbakiak-deskonposatu-sol/" target="_blank">Erantzunak ikusi</a><br />
</strong></span></p>
<p><strong><span style="color:#000000;"> </span></strong></p>
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			<media:title type="html">jrcf</media:title>
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		<title>Protegido: Zenbakiak deskonposatu!</title>
		<link>http://jakinmate.wordpress.com/2009/12/07/zenbakiak-deskonposatu-sol/</link>
		<comments>http://jakinmate.wordpress.com/2009/12/07/zenbakiak-deskonposatu-sol/#comments</comments>
		<pubDate>Mon, 07 Dec 2009 21:24:59 +0000</pubDate>
		<dc:creator>jrcf</dc:creator>
				<category><![CDATA[Soluzioak]]></category>

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