Worksheet with ornament addends and tree sum. Multi-use: Teacher can handwrite as desired for students to find the missing addend or the missing sum. Students can roll number cubes and fill in the ornaments to find the sum, etc. Great in sheet protectors for early finishers, or keep in a math center. My kids used to keep number cubes in their pencil boxes for addition and subtraction practice as early finishers, bell work, etc.