The numbers, 1, 2, 3, 4 ….. are natural numbers & are called positive integers while the numbers – 1, - 2 , - 3 etc. are called negative integers.
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Addition and Subtraction Integers 60 Days Of Practice Workbook: Daily Math Workbook, Add, Subtract Integers, Positive and Negative Numbers Using Number Line With Rules & Answer Key, For Middle School, Grades 5-8