1. Find the sum 4(+4) +(+20)? 2. Find the sum (-15)+(-8)? 3. What is the sum of (-14+(+14)? 4. What is (-20) more than (+2)? 5. Find the difference 7-(+9)? 6. What is difference when 8 is decreased by-6? 7. What is the total of -11 and-3? 8. Find the difference 12-9? 9. Subtract 9-(-3)? 10. Find the difference (-7)-(+8)?