how do you add and subtract + and - numbers? Is there a rule?

Yes. The adding rule is this: If the signs are the same, add the numbers directly, then use the sign of the numbers. If the signs are different, Subtract the smaller from the larger, and use the sign of the larger.

Example
add -4 + 2
subtract 2 from four, and used the negative sign.

example:
add -3 + -3
answer -6

The subtracting rule: Change the sign of the number being subtracted, then use the adding rule to add.

Example: Subtract -3 from 6

Change the sign of the -3 to +3, then add + 3 to 6

Example Subtract 6 from -9
change the sign of +6 to -6, then use the adding rule to add -6 to -9 to get -15

thanks!!!

Yes. The adding rule is this: If the signs are the same, add the numbers directly, then use the sign of the numbers. If the signs are different, Subtract the smaller from the larger, and use the sign of the larger.

Example
add -4 + 2
subtract 2 from four, and used the negative sign.

example:
add -3 + -3
answer -6

The subtracting rule: Change the sign of the number being subtracted, then use the adding rule to add.

Example: Subtract -3 from 6

Change the sign of the -3 to +3, then add + 3 to 6

Example Subtract 6 from -9
change the sign of +6 to -6, then use the adding rule to add -6 to -9 to get -15

To add and subtract positive and negative numbers, you can follow these rules:

1. Adding numbers with the same signs:
- If the signs of the numbers are both positive or both negative, you can simply add the numbers together and keep the same sign for the result. For example:
- (+4) + (+2) = +6
- (-3) + (-3) = -6

2. Adding numbers with different signs:
- If the signs of the numbers are different, subtract the smaller number from the larger number and keep the sign of the larger number for the result. For example:
- (+4) + (-2) = +2 (subtract 2 from 4 and use the positive sign)
- (-4) + (+2) = -2 (subtract 2 from 4 and use the negative sign)

3. Subtracting numbers:
- To subtract a number, change the sign of the number being subtracted and then follow the rules for addition. For example:
- Subtracting (-3) from 6: Change the sign of -3 to +3 and then add +3 to 6: 6 + (+3) = 9
- Subtracting 6 from (-9): Change the sign of 6 to -6 and then add -6 to -9: -9 + (-6) = -15

Remember to always apply the rules carefully and pay attention to the signs of the numbers involved.