INTEGERS
Positive integers, zero
and negative integers altogether constitute the integers.
In the number lines,
the numbers on the right of 0 are increasing and the numbers on the left of 0
are decreasing.
If the sum of two
numbers is zero, then they are additive inverse of each other.
Sum of two positive
numbers is positive. The sum of two negative numbers is negative.
The sum of positive
number and a negative number is either positive or negative or zero.
Subtracting an
integer from another integer is same as adding the additive inverse of the
second to the first number.
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