1. 3 21/25 + 1 2/5=3 21/25+1 10/25 =4 31/25=5 6/25 2. 4 13/16 - 2 3/8=4 13/16 - 2 6/16=2 7/16 3. 5 5/6 - 31/48=5 40/48 - 31/48=5 9/48=5 3/16