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FOUR BASIC ARITHMETIC OPERATIONS Review of Introductory Mathematics FOUR BASIC ARITHMETIC OPERATIONS This chapter reviews the basic mathematical operations of addition, subtraction, multiplication, and division of whole numbers. EO 1.2 APPLY   one   of   the   arithmetic   operations   of addition, subtraction, multiplication, and division using whole numbers. Calculator Usage, Special Keys This chapter requires the use of the +, -, x,     , and = keys.   When using a TI-30 calculator, the ÷ number and operation keys are entered as they are written. For example, the addition of 3 plus 4 is entered as follows: 3 key, + key, 4 key, = key, the answer, 7, is displayed Parentheses The parentheses keys allow a complicated equation to be entered as written. This saves the time and effort of rewriting the equation so that multiplication/division is  performed  first  and  addition/subtraction  is  performed  second,  allowing  the problem to be worked from left to right in one pass. The Decimal Numbering System The decimal numbering system uses ten symbols called digits, each digit representing a number. These symbols are 0, 1, 2, 3, 4, 5, 6, 7, 8 and 9.   The symbols are known as the numbers zero, one, two, three, etc.   By using combinations of 10 symbols, an infinite amount of numbers can be created.   For example, we can group 5 and 7 together for the number 57 or 2 and 3 together for the number 23.   The place values of the digits are multiples of ten and given place titles as follows: MA-01 Page 6 Rev. 0


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