<span>а) 0,65*3,4+45.25:25
</span><span>0,65*3,4=2,21
</span><span>45.25:25 =1,81
</span>2,21+1,81=4,02<span>
б) 19.6:1.6-0.85*4.4
</span>19.6:1.6=12,25<span>
0.85*4.4=3,74
</span><span>12,25-3,74=8,51</span>
<span>(a</span>²<span>b+ab)/ab=ab(a+1)/ab=a+1.</span>