<p><strong>а)</strong></p>
<p>11₂ = 1 * 2¹ + 1 * 2⁰ = 2 + 1 = 3</p>
<p><strong>б)</strong></p>
<p>1010₂ = 1 * 2³ + 0 * 2² + 1 * 2¹ + 0 * 2⁰ = 8 + 0 + 2 + 0 = 10</p>
<p><strong>в)</strong></p>
<p>11011₂ = 1 * 2⁴ + 1 * 2³ + 0 * 2² + 1 * 2¹ + 1 * 2⁰ = 16 + 8 + 0 + 2 + 1 = 27</p>