How do you add two signed numbers if the signs are the same?
Keeping this in view, what are the rules for adding signed numbers?
When adding two numbers with like signs, add the values and keep the common sign. When adding two numbers with unlike signs, subtract the values and use the sign of the larger-valued number. Change the subtraction operator to addition and change the sign of the number that immediately follows.
Additionally, what is true about the sum when both addends are positive? When adding integers with the same sign, the sum is equal to the sum of the absolute values of each addend and has the sign common to the addends. Both addends are positive, so the sum is positive. Both addends are negative, so the sum is negative.
Likewise, what happens when you add opposite numbers?
Rule: The sum of any integer and its opposite is equal to zero. Summary: Adding two positive integers always yields a positive sum; adding two negative integers always yields a negative sum. To find the sum of a positive and a negative integer, take the absolute value of each integer and then subtract these values.
What is an unsigned number?
2.5 SIGNED AND UNSIGNED NUMBERS. Unsigned binary numbers are, by definition, positive numbers and thus do not require an arithmetic sign. The most significant bit of a binary number is used to represent the sign bit. If the sign bit is equal to zero, the signed binary number is positive; otherwise, it is negative.