Mixed Operations Worksheets | Turtle Diary Mixed Operations Worksheets. Showing 1-5 of 5 results. Select: 13 Downloads Grade 4, 5 Input/Output Tables. 65 Downloads Grade 4, 5 Order of Operations. 27 Downloads Grade 1 Fact Families. 22 Downloads Grade 1 Adding Three One-Digit Numbers (Sums up to 20) 25 Downloads Grade 1 Addition Strategies: Using Doubles.