Today's class was about computer number systems: binary, octal, and hexadecimal. Addition and subtraction methods were also discussed. Homework: 1. (The numbers in this equation are all binary) 10101 + 1000110 + 111 = ? 2. (The numbers in this equation are all binary) 10001 - 111 = ? 3. (The numbers in this equation are all octal) 7 + 7 - 3 = ?

Convert the following into both prefix and postfix: 1+(5/2*2^2)-3 (9+1)/2*(3+7) Bonus Question: Let A be a variable for a number. Given the following postfix equation: 2A*1-7A*+5+ = 49 What value of A makes this equation true?

The following list is a Stack. Solve the following problem: AABBCDA Pop() Pop() Push(A) Push(E) Pop() Push(D) Pop() Push(A)