MathsIntegersAddition of Integers – Part 2

Addition of Integers – Part 2

Table of Contents

  • Addition of two Negative Integers
    • Using Number Line
    • Using Absolute Values
  • Summary
  • What’s Next?

In the previous segment, we discussed the addition of two positive integers. In this segment, we will look at the addition of two negative integers.

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    Addition of two negative integers

    • The sum of two negative integers is always negative.
    • Adding a negative integer decreases the value of a number.
    • That is, adding a negative integer is the same as subtraction of its absolute value.
    • There are two ways in which two negative integers can be added:
      • Using the number line
      • Using absolute value

    Let us understand each of the method using the following example:

    Q. Add -4 and -2.

    Solution:

    (i) Using the number line

    Mark -4 on the number line.

    That is, move four steps from 0, towards the left.

    Next, -2 is to be added.

    Adding a negative integer is the same as subtraction of its absolute value.

    The absolute value of -2 is 2.

    So, ‘add -4 and -2’ is the same as ‘subtract 2 from -4’.

    On a number line, moving towards the left means subtraction. Therefore to add -2, we move 2 steps to the left from -4.

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