1. **State the problem:** Perform binary addition for the first problem: $1010 + 0011$. 2. **Recall the rules for binary addition:** - $0 + 0 = 0$ - $0 + 1 = 1$ - $1 + 0 = 1$ - $1 + 1 = 10$ (which means write 0 and carry 1 to the next higher bit) 3. **Add the numbers bit by bit from right to left:** - Rightmost bit: $0 + 1 = 1$ - Next bit: $1 + 1 = 10$, write 0 carry 1 - Next bit: $0 + 0 + 1$ (carry) $= 1$ - Leftmost bit: $1 + 0 = 1$ 4. **Write the result:** $1010 + 0011 = 1101$ **Final answer:** $1101$