Save_Mathematics/P5/map511m05/map511m5a09/source.txt


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<p>
 this activity is related on how we can multiply two numbers and check if the product found is correct or not.we use proof.
</p>
<h4>
 by making a proof we use the chart :
 <span class="multilang" style="font-weight: normal;" lang="am">
  x
 </span>
</h4>
<p>
 <br />
 <span style="text-decoration: underline; font-weight: bold;">
  Examples
 </span>
 :here we have some calculation on multiplication and we shall check if the product found is correct or not.
 <br />
 1) 234
 <br />
 x
 <span style="text-decoration: underline;">
  12
 </span>
 <br />
 468
 <br />
 +
 <span style="text-decoration: underline;">
  234
 </span>
 <br />
 2808
 <br />
 <br />
 2)2375
 <br />
 x
 <span style="text-decoration: underline;">
  125
 </span>
 <br />
 11875
 <br />
 +4750
 <br />
 <span style="text-decoration: underline;">
  2375
  <br />
 </span>
 296,875
 <br />
 here are some rules to follow when making a proof of seeing if the product found are correct or not.
 <br />
 <br />
 <span style="font-weight: bold; text-decoration: underline;">
  Rules:
 </span>
 <br />
 a.Add the digits in multicand until you get a single digit and fill in the chart
 <br />
 <br />
 b.Add the digits of the multiplier until you get a single digit and fill in the chart.
 <br />
 <br />
 c.Multiply the two answers obtained
 <br />
 <br />
 d.Add the digit of the product
 <br />
 <br />
 e.Add the digits of the answers if it is a single digit.
 <br />
 <br />
 <span style="font-style: italic;">
 </span>
 <br style="font-style: italic;" />
</p>
&nbsp;
<table style="font-style: italic;" border="1" width="100%" align="middle">
 <tbody>
 </tbody>
</table>
<p>
 <span style="text-decoration: underline; font-style: italic;">
  Application of the above rules in the above examples
 </span>
 <span style="font-style: italic;">
 </span>
</p>
<p>
 here is an image of like
 <span style="font-weight: bold;">
  x in which
 </span>
 numbers are in the intersection of 2 lines.we are going to apply the above rules by checking if the product found on the above examples are correct or not.
</p>
<p>
 1)a)2+3+4=9
</p>
<p>
 b)1+3=4
</p>
<p>
 c)9x3=27=2+7=9
</p>
<p>
 d)2+8+0+8=18=1+8=9
</p>
<p>
 if the numbers found on rules c and d are equal the product is correct else it's incorrect.For our first example the product is correct because number found on rule c and d are the same.
</p>
<p>
 2)a)2+3+7+5=17=1+7=8
</p>
<p>
 b)1+2+5=8
</p>
<p>
 c)8x8=64=6+4=10=1+0=1
</p>
<p>
 d)2+9+6+8+7+5=37=3+7=10=1+0=1
</p>
<p>
 As the number found in rule c and d are the same,our product is correct.
</p>
<p>
 &nbsp;
</p>