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A number with no sign is considered to be POSITIVE. For example:
3 = +3
8 + 2 = ( + 8) + ( + 2)
8 - 3 = ( + 8) - ( + 3)
Sometimes you find the '+' sign in front of a positive number, other times it is omitted, especially in higher level classes. In the first time I recommend you to use it (rewrite the problem with '+' signs), but as you proceed you should try to solve the problems without it. I show you examples here for both ways.
NOTE: Signed numbers should always be in parantheses. As a general rule, we can never write two signeds next to each other:
Instead of 5 + -3 you should write: 5 + (- 3 ). Or instead of 4 + +2 you should write: 4 + (+ 2 ).
First ask yourself: Do the numbers have the same sign?
Based on your answer choose rule #1 or rule #2.
Rule 1. If the numbers have same signs- Ignore the signs of the numbers
- Add the unsigned numbers together
- Include the original sign of the numbers to the answer
- Ignore the signs of the numbers
- Subtract the smaller number from the larger one
- Include the original sign of the LARGER number to the answer
Turn your subtraction into addition as follows:
- Change the operation sign from subtraction to addition
- AND change the sign of the second number at the same time
- Follow the rules for addition above
Examples:(-6)-(+4)(+4)-(-7)-3 - 4 = (-3)-(+4)Change to addition:(-6) + (-4)(+4)+(+7)(-3)+(-4)Follow the rules of addition:- 10+ 11- 7
Believe or not, the hard part is over. Multiplication and division are far easier than addition and subtraction.
They even have the same rules:
- Ignore the signs and do the operation (multiply or divide)
- If the original signs were the same, your answer is POSITIVE
- If the original signs were different, your answer is NEGATIVE
Examples:(-6) (+4)(+4) (-7)(-12) (-4)Ignore the sign and do the operation:6 4 = 244 7 = 2812 4 = 3Follow the rule of signes:- 24- 28+ 3
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There are different rules for different operations.
What are the rules governing operations of real numbers?
There are different rules for different operations.
What are rules governing operations of real numbers?
tang ina
What are the rules governing real numbers?
There are many. There are those that deal with the four basic binary operations, then there are rules governing exponents and logarithms.
What are the rules governing of real numbers?
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What rules apply to performing operations with signed numbers?
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