Complete all multiplication and division in order from left to right. Complete all addition and subtraction in order from left to right. They include rational and irrational numbers. Irrational numbers are numbers that can not be made into exact fractions. Whole numbers are all positive real numbers starting with zero.
Integers are all real whole numbers including positive and negative numbers.
The sum of a number and two. The difference of a number and two. The product of a number and two. The quotient of a number and two. A variable is an unknown.