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<p>
1) Substract following numbers:
<br />
<br />
</p>
<ol>
<li>
647 - 63
</li>
<li>
837 - 76
</li>
<li>
748 - 123
</li>
<li>
837 - 787
</li>
<li>
9484 - 2737
</li>
<li>
2424 - 909
</li>
<li>
5454 - 356
</li>
<li>
2837 - 2525
</li>
<li>
9388 - 7336
</li>
<li>
2736 - 938
</li>
<li>
2938 - 1212
</li>
<li>
7585 - 2424
</li>
<li>
6353 - 1234
</li>
<li>
8696 - 1122
</li>
<li>
9990 - 8890
</li>
</ol>
<p>
2) Complete the substraction table below:
<br />
<br />
</p>
<table border="1" width="100%">
<tbody>
<tr>
<td width="17%" valign="top">
-
<br />
</td>
<td width="17%" valign="top">
756
<br />
</td>
<td width="17%" valign="top">
3800
<br />
</td>
<td width="17%" valign="top">
7700
<br />
</td>
<td width="17%" valign="top">
1600
<br />
</td>
<td width="17%" valign="top">
3000
<br />
</td>
</tr>
<tr>
<td width="17%" valign="top">
121
<br />
</td>
<td width="17%" valign="top">
635
<br />
</td>
<td width="17%" valign="top">
<br />
</td>
<td width="17%" valign="top">
<br />
</td>
<td width="17%" valign="top">
<br />
</td>
<td width="17%" valign="top">
<br />
</td>
</tr>
<tr>
<td width="17%" valign="top">
200
<br />
</td>
<td width="17%" valign="top">
<br />
</td>
<td width="17%" valign="top">
<br />
</td>
<td width="17%" valign="top">
7500
<br />
</td>
<td width="17%" valign="top">
<br />
</td>
<td width="17%" valign="top">
<br />
</td>
</tr>
<tr>
<td width="17%" valign="top">
300
<br />
</td>
<td width="17%" valign="top">
<br />
</td>
<td width="17%" valign="top">
<br />
</td>
<td width="17%" valign="top">
<br />
</td>
<td width="17%" valign="top">
<br />
</td>
<td width="17%" valign="top">
<br />
</td>
</tr>
<tr>
<td width="17%" valign="top">
130
<br />
</td>
<td width="17%" valign="top">
<br />
</td>
<td width="17%" valign="top">
<br />
</td>
<td width="17%" valign="top">
<br />
</td>
<td width="17%" valign="top">
<br />
</td>
<td width="17%" valign="top">
2870
<br />
</td>
</tr>
</tbody>
</table>
<p>
<br />
<br />
3) Complete following arithmetic progression:
<br />
<br />
</p>
<ol>
<li>
700 ; 690 ; 680 ; --------- ; ---------- ; ------------ .
</li>
<li>
89 ; 85 ; 81 ; ---------- ; ------------- ; -------------.
</li>
<li>
90 ; 80 ; 70 ; ------------ ; ------------- ; ------------.
</li>
<li>
99 ; 96 ; 93 ; ----------- ; ------------ ; --------------.
</li>
<li>
500 ;450 ; 400 ; ----------;------------;--------------.
</li>
<li>
1150 ; 1148 ; 1146 ; --------------- ; --------- ; ---------.
</li>
<li>
835 ; 735 ; 635 ;----------;------------;---------------.
</li>
<li>
38536; 37536; 36536 ; ------------ ;-------- ; ---------.
</li>
<li>
7965 ; 7665 ; 7365 ; ------------- ; ------------ ; -----------.
</li>
<li>
8999 ; 7999 ;6999 ; --------------;-------------;-------------.
</li>
</ol>
<p>
<br />
4) Francis had 80 000Rwf on his account . He lent 57 000 Rwf to his friend Aloys.
<br />
How much money left on his account?
<br />
<br />
5) Habimana had 10 000 cows in his farm . 890 of them died because of disease. How many cows left ?
<br />
<br />
6) In an institution of 10 000 Students , 6 000 of them passed at the first session , 3000 passed at the second session in 2010. How many students have repeated the year ?
<br />
<br />
7) Find the ratio of the following progression :
<br />
<br />
</p>
<ul>
<li>
75 ; 70 ; 65 ; 60 ; 55
</li>
<li>
274 ; 264 ; 254 ; 244
</li>
<li>
7765 ; 7565 ; 7365 ; 7165 ;
</li>
<li>
9090 ; 9082 ; 9076 ; 9068;
</li>
<li>
8574 ; 7574 ; 6574 ; 5574 ;
</li>
</ul>
<p>
<br />
<br />
</p>
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