Abacus Addition & subtraction 4 and 5 digits all combinations Division 5÷2 digits Square roots 3 and 4 digits combined operations Mental theory Addition & subtraction (3 and 4 digits all combinations) Mixed calculations (÷, -, x, +) with bodmas rule decimal 5 digits all combinations Multiplication 3×2 digits Division 4÷1 digits, 3÷2 digits Decimal additions subtractions Decimal multiplication Decimal divisions Factions