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Using the process of elimination 10

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 .