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While, subtraction of $$2$$ integers, depending upon the sign of the two or more integers, the answer can change.

Subtraction on integers:
When two integers have a different sign, the sign of the answer will be the sign of the largest integer and both numbers will be subtracted.
Example:
1. Find the value: $-5+9$

The given expression is ($$-5$$) and ($$9$$) since these numbers have different signs, so the difference of the numbers are taken, and the answer will have the sign of a larger number.

Hence the answer is $$+4$$.

Further examples:

2. $$(-20) + 13 = -7$$

3. $$30 - 15 = 15$$

4. $$20 + (-10) = 10$$

5. $$-30 + 50 = 20$$
When two integers are subtracted, ($$+ve$$)$$-$$($$-ve$$), or ($$-ve$$)$$-$$($$-ve$$),  since $$-ve$$ multiplied by $$-ve$$ is $$+ve$$, the operand between both numbers will be taken as $$+$$.
Example:
1. $$(-10) - (-10) = (-10) + 10 = 0$$

2. $$(20) - (-10) = 20 + 10 = 30$$

3. $$(-50) - (-15) = -50 + 15 = -35$$

4. $$(25) - (-15) = 25 + 15 = 40$$
When two integers are subtracted, in this manner, ($$+ve$$) $$-$$ ($$+ve$$), both integers should be subtracted, and the sign of the answer will be the sign of the highest integer.
Example:
1. $$30 - 10 = 20$$

2. $$40 - 12 = 28$$

3. $$10 - 50 = -40$$

4. $$20 - 48 = -28$$