<span> 1) 54-37=17</span>
<span />82-37=45
93-67=26
82-65=17
<span>2) 100-(60+24)=16 </span>
<span /><span>(70+25)-90=5</span>
<span>60-(80-37)=17 </span>
<span>70-(50-6)= 26</span>
<span>9+7-8= 8</span>
<span>9-4+7= 12</span>