<span>200/2*(540+460)/10=10000</span>
<span>1. (540+460)=1000</span>
<span>2. 200/2=100</span>
<span>3. 100*1000=100000</span>
<span>4.100000/10=10000</span>
<span>
</span>
<span><span>1200-200/40*5*5=1075</span></span>
<span><span>1. 200/40=5</span></span>
<span><span>2. 5*5*5=125</span></span>
<span><span>3. 1200-125=1075</span></span>
<span><span>
</span></span>
<span><span><span>1200-200/(40*50)*5=1199,5</span></span></span>
<span><span><span>1. 40*50=2000</span></span></span>
<span><span><span>2. 200/2000=0,1</span></span></span>
<span><span><span>3. 0,1*5=0,5</span></span></span>
<span><span><span>4. 1200-0,5=1199,5</span></span></span>
<span><span><span>
</span></span></span>
<span><span><span><span>(1200-200/40)*5*5=625</span></span></span></span>
<span><span><span><span>1. 1200-200=1000</span></span></span></span>
<span><span><span><span>2. 1000/40=25</span></span></span></span>
<span><span><span><span>3. 25*5=125</span></span></span></span>
<span><span><span><span>4. 125*5=625</span></span></span></span>