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Math test today!!! So what is a negative minus and plus a positive?

2006-09-14 03:35:25 · 9 answers · asked by Anonymous in Education & Reference Homework Help

please hurry! I need to go in 8 minutes!

2006-09-14 03:38:43 · update #1

9 answers

-(-) + +=POSITIVE

2006-09-14 04:33:46 · answer #1 · answered by T.I 5 · 0 0

Positive numbers are any numbers greater than zero, for example: 1, 2.9, 3.14159, 40000, and 0.0005. For each positive number, there is a negative number that is its opposite. We write the opposite of a positive number with a negative or minus sign in front of the number, and call these numbers negative numbers. The opposites of the numbers in the list above would be: -1, -2.9, -3.14159, -40000, and -0.0005. Negative numbers are less than zero . Similarly, the opposite of any negative number is a positive number. For example, the opposite of -12.3 is 12.3.
We do not consider zero to be a positive or negative number.
The sum of any number and its opposite is 0.
The sign of a number refers to whether the number is positive or negative, for example, the sign of -3.2 is negative, and the sign of 442 is positive.
We may also write positive and negative numbers as fractions or mixed numbers.

The following fractions are all equal:

(-1)/3, 1/(-3), -(1/3) and - 1/3.

The following mixed numbers are all equal:

-1 1/6, -(1 1/6), (-7)/6, 7/(-6), and - 7/6.

2006-09-14 03:41:28 · answer #2 · answered by euphoric 2 · 0 0

depends. -10+5=-5 or -10+37=27. there is no general rule for adding and subtracting with negative and positive numbers like there is for multiplication and division. such as a negative multiplied by a positive number will always give you a negative number.

2006-09-14 03:47:11 · answer #3 · answered by practicalwizard 6 · 0 0

Your question is not very clear.
However, see if you can understand the following answers. If not, mail me. Good luck.

Negative X Positve = Negative
Negative X Negative = Positve
Positve X Positve = Positve
Positve X Negative = Negative

RAVI

2006-09-14 03:45:55 · answer #4 · answered by sravi_iyer 1 · 0 0

a negative + a postive makes the answer go back twards 0 and on up..

Negative + a negative is more negative...

Postive + a negative is same as subtracting the two numbers..

Postive + a postive is simple addition...

2006-09-14 03:46:35 · answer #5 · answered by Sarah G 2 · 0 0

Those who have been away from using mathematical concepts for a while often have trouble combining positive and negative numbers. Look at the picture below:






negative numbers are illustrated branching away from zero to the left. positive numbers branch away to the right. The whole line, though, represents increasing values from left to right. Yes, that means that -2 is a bigger number than -5. Consider this line a thermometer then you will see that -2 degrees is warmer than -5 degrees. (Not much warmer, but warmer)




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Addition of Positive and Negative Numbers


When we add numbers together we wish to know their combined value.




Example:

Mary's section had $420 left over at the end of the budget year and John's section had $200 left over. How much did their sections contribute to the department budget at year's end?

$420 + $200 = $620
When both numbers are positive, we simply add their values and get another positive number.






Example:

Mary's section spent $420 over their budget at the end of the budget year and John's section overspent $200. How much did their sections affect the department budget at year's end?

(-$420) + (-$200) = -$620
When both numbers are negative, again we simply add their values and we get another negative number.





Example:

Mary's section spent $420 over their budget at the end of the budget year and John's section had a $200 surplus. How much did their sections affect the department budget at year's end?

(-$420) + $200 = -$220



Example:

Mary's section had $420 left over at the end of the budget year and John's section spent $200 over. How much did their sections affect the department budget at year's end?

$420 + (-$200) = $220
When one number is positive and one number is negative, we must find the difference between the numbers. The result will be positive if the larger value is positive or negative if the larger value is negative.


--------------------------------------------------------------------------------


Subtraction of Positive and Negative Numbers


When we subtract a number from another number, we are looking for the difference between them. If we subtract a smaller number from a larger number, the result is positive whether the numbers are positive, negative, or mixed. If we subtract a larger number from a smaller number, the result is negative whether the numbers are positive, negative or mixed. (Remember, -5 is smaller than -2.)




Example:

Mary's section had $420 left over at the end of the budget year and John's section had $200 left over. How much more did Mary's section save than John's?

$420 - $200 = $220

How did John's section compare with Mary's?

$200 - $420 = -$220
When both numbers are positive, we find their difference (subtract one from the other) then apply the appropriate sign.




Example:

Mary's section spent $420 over their budget at the end of the budget year and John's section spent $200 over. How much more did Mary's section overspent when compared to John's?

(-$420) - (-$200) = -$220

How did John's section compare with Mary's?

(-$200) - (-$420) = $220
When both numbers are negative, again we find their difference (subtract one from the other) then apply the appropriate sign.




Example:

Mary's section spent $420 over their budget at the end of the budget year and John's section had $200 left over. How did Mary's section compare with John's?

(-$420) - $200 = -$620

How did John's section compare with Mary's?

($200) - (-$420) = $620 i hopes this helps :) multipying negatviest and positves are a little different such as 6x-2=-12 and -6x-7=+42

2006-09-14 03:39:50 · answer #6 · answered by Anonymous · 1 0

If a positine is greater than a negetive(-8 +9) then the result will be positive. But if the negetive is biger(-9+8) then the result will be negetive. and if they are both equal(-8+8) then it will be zero

2006-09-14 04:02:37 · answer #7 · answered by Aroran 2 · 0 0

See example below:
A.)
-5 + 6
= -5 + (6)
= 1

B.) -6 + 5
= -6 + (5)
= -1

2006-09-14 03:43:37 · answer #8 · answered by Anonymous · 0 0

negative

2006-09-14 03:43:01 · answer #9 · answered by Trans Atlantic 2 · 0 0

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