Tham khảo tài liệu 'using the process of elimination 10', ngoại ngữ, anh ngữ phổ thông phục vụ nhu cầu học tập, nghiên cứu và làm việc hiệu quả | THEA MATH REVIEW Symbols of Addition In addition the numbers being added are called addends. The result is called a sum. The symbol for addition is called a plus sign. In the following example 4 and 5 are addends and 9 is the sum 4 5 9 Symbols of Subtraction In subtraction the number being subtracted is called the subtrahend. The number being subtracted FROM is called the minuend. The answer to a subtraction problem is called a difference. The symbol for subtraction is called a minus sign. In the following example 15 is the minuend 4 is the subtrahend and 11 is the difference 15 - 4 11 Symbols of Multiplication When two or more numbers are being multiplied they are called factors. The answer that results is called the product. In the following example 5 and 6 are factors and 30 is their product 5 X 6 30 There are several ways to represent multiplication in the above mathematical statement. A dot between factors indicates multiplication 5 6 30 Parentheses around any one or more factors indicate multiplication 5 6 30 5 6 30 and 5 6 30. Multiplication is also indicated when a number is placed next to a variable 5a 30. In this equation 5 is being multiplied by a. Symbols of Division In division the number being divided BY is called the divisor. The number being divided INTO is called the dividend. The answer to a division problem is called the quotient. There are a few different ways to represent division with symbols. In each of the following equivalent expressions 3 is the divisor and 8 is the dividend 8 3 8 3 -8- 3 8 85 --------------------------------- THEA MATH REVIEW --------------------------------------- Prime and Composite Numbers A positive integer that is greater than the number 1 is either prime or composite but not both. A prime number is a number that has exactly two factors 1 and itself. Examples 2 3 5 7 11 13 17 19 23 . A composite number is a number that has more than two factors. Examples 4 6 8 9 10 12 14 15 16 . The number 1 is neither prime nor .
