First Grade Worksheets / FREE Printable Worksheets - Worksheetfun Math Worksheets Addition Worksheets Addition - Picture Addition - 1 Digit Addition - Sums up to 20 Addition Doubles Addition Doubles Plus One Addition - Adding 3 Numbers Addition - Adding 4 Numbers Addition - Making 10 Addition - Missing Addend Balancing Equations Addition - Ways to Make a Number Addition - Picture Addition - Dice