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SAI International School
                                                        CLASS-VI
                    Mathematics
                    CHAPTER-6: Integers

                    LESSON NOTES-2


                    SUBTOPIC: Ordering of integers and Additive inverse

                         It is important to understand here the order of integers.

                         As we move to the right the value of integers is increasing.
                         Hence 7 is greater than 4, 4 is greater than 1, 0 is greater than -1, 1 is greater

                          than - 2 and so on.
                         Therefore, – 3 < – 2, – 2 < – 1, – 1 < 0, 0 < 1, 1 < 2, 2 < 3 so on.
                         By looking at the number line we can see what integers lie between two

                          integers and which the greater integer is.
                         The number line also tells us how much we need to move in order to go from

                          one integer to another.


                       Ex-Compare the following pairs of numbers using > or <

                                 0 > -8,     -5 < 5,   -1> -15

                    Additive Inverse of an integer:


                         Two integers whose sum is zero are called additive inverses of each other.
                          They are also called the negatives of each other.

                         Additive inverse of an integer is obtained by changing the sign of the integer.
                          For example, the additive inverse of +5 is –5 and the additive inverse of –3 is

                          +3.
                    Successor and Predecessor of an integer:

                        In integer number line, number to left is predecessor and number to right
                          is successor.


                        Predecessor is 1 less than the number and successor is 1 greater than the
                          number.
                               Ex- Successor  and  predecessor of -5 will be -4 and -6 respectively.
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