The addition rules for binary numbers, or two-system, are [[$ 0 + 0 = 0, 0 +1=1 + 0 = 1, 1 +1 = 10 $]].
What are the corresponding multiplication rules? In a binary system, use the addition and multiplication rules to calculate [[$110 + 1011$]] and [[$11 \cdot 101$]].

(Source: Finnish matriculation exam, spring 2000).