1. -|-31/4|+(+7/2) =-(31/4)+7/2 =-31/4+7/2 =-31/4+14/4 =-17/4 2. |-4/5|+(+1/2) =4/5+1/2 =8/10+5/10 =13/10 3. -|-14|+|-12| =-14+12 =-2 4. |-(-22/7)|+|-8/21| =22/7+8/21 =66/21+8/21 =74/21 over