What do the instructions mean by “decimal” and “integer” numbers?
All the basic level worksheets here begin with positive integer values, that is, positive whole numbers, and zero. Decimal values in the advanced addition, subtraction, and multiplication worksheets include 2 digits to the right of the decimal place. In the division worksheets, decimal is used to indicate problems that do not have whole number answers — they can be used to practice calculations where “remainders” occur, or for the calculation of decimal answers.