Analysis: There is no indication that this figure is included in the question. The number from several to several in the first grade mathematics is an integer.

So the numbers from 2 to 9 are: 3, 4, 5, 6, 7 and 8.

So there are six numbers from 2 to 9.

Addition: operation of combining two numbers into one number/operation of combining two decimals into one decimal/operation of combining two fractions into one fraction Subtraction: operation of finding the other addend by knowing the sum of two addends and one of them.

Multiplication: A simple operation to find the sum of several identical addends. The meaning of decimal multiplication by integer is the same as that of integer multiplication. Multiplying a number by a pure decimal means finding a few tenths and a few percent of this number ... The meaning of multiplying a fraction by an integer is the same as that of integer multiplication.

Division: the operation of finding another factor by knowing the product of two factors and one of them. It means the same as integer division.