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In integers how to add and subtract without number line
Addition of integers means there are three possibilities. They are:
- Addition between two positive numbers,
- Addition between two negative numbers and
- Addition between a positive number and a negative number.
Addition of two positive integers always gives a positive integer (2+3=5).
Addition of two negative integers always give a negative integer [-2+(-3)=-(2+3)=-5].
To add integers with different signs, keep the sign of the number with the largest absolute value and subtract the smallest absolute value from the largest [-10+8=-(10-8)=-2].
Subtraction of Integers:
- Transform the subtraction of integers problem into the addition of integers problem.
- First, keep the first number. Second, change the operation from subtraction to addition.
- Third, get the opposite sign of the second number.
- Finally, proceed with the regular addition of integers.
9-(-7)=9+(+7)=9+7=16.
Updated on: 10-Oct-2022
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