1. Today’s Agenda 1.Research Paper –Rough draft due Today –Peer edit session on Wed, Feb. 13 Meet in Hertz Writing Center at 1:00 p.m. –Final version due Wed, Feb. 20 –Oral presentation Tues, Mar. 11 (Final exam period) 2.Attendance & lab pair groupings 3.Binary Arithmetic 4.Number Systems 5.Lab 6 with Simcir Circuit Simulator

2. When is 1 + 1 ≠ 2

3. Binary Addition 010 +100

4. Half-Adder Circuit A = 0Sum CarryB = 1

5. Binary Subtraction 110 -101

6. Subtraction Circuit: A - B A 123 S1S1 S2S2 B 123 +1 S3S3

7. 10110 * 100 3

8. 10110 ÷ 100 4

9. 10110 equivalent in decimal (base 10) 5

10. 15 10 equivalent in binary (base 2) 7