Addition and Subtraction Facts to 20. The basic addition and subtraction facts are all the combinations of 1-digit numbers (2+2, 6+9, 8+4, etc.) and the corresponding subtraction exercises (18-9, 7-4, etc.). (See the fact chart at the end of this page.) To you, these are probably automatic. read more
Addition Facts Worksheets Basic addition fact worksheets contain single digit addition facts from 0 through 9, theme-based facts, mixed addition facts and dart-board addition. This page has worksheets with the addends arranged in the horizontal and vertical forms. read more
Use addition skills to solve the addition square puzzles. Sum Game. Print the game boards and color pairs of adjacent numbers with a given sum. Addition-Subtraction Mix (Basic) These worksheets, flashcards, and number lines have a mix of basic addition and basic subtraction problems. read more