GAME INSTRUCTIONS
Online Christmas math game to learn subtraction up to 20 with an interactive online activity. By clicking on the settings, you can change the range of numbers and practice subtraction up to 10, 20, 100 or 1000. Perform mathematical operations of subtraction, subtraction of numbers, and drag the puzzle piece to the number resulting from the subtraction. Complete the puzzles practicing subtraction with numbers up to 20, two digits or three digits, at Christmas.