Math Help??

Question

Positive # + a negative#would go up or down.
Well here's an example: 8+-4= -4???
Am I right please help

Answer 1

no,it will be +4
8+-4=8-4=4

Answer 2

8+-4 = 8+(-4) = 8-4 = 4

In general, the number with the bigger magnitude(without bothering about the sign) gets to retain its sign in the answer.

In the above case, the 8 is bigger than 4 and the result retains that positive sign.

In this case: 8 + -12, the answer is -4 as 12 is bigger.
If it was -12 + 8, same thing.. Take the difference (signs are different) 12 is bigger, and the result is -4.

And always remember that 8+-10 or 210+-4548 is the same as 8-10 or 210-4548 and so on...

And that's about as simple or not too mathematical I can make it.
Hope that helped.

Answer 3

No, you're wrong. The plus sign here is meaningless. Once you get rid of it, you have 8 minus 4, and you have known the answer to that since first grade.

Now you might have a problem if the question were -8 plus 4, in which case your answer would be correct. The larger number in absolute terms carries the weight. Think distance from zero.

Answer 4

no, the answer to this would be +4

the trick while assigning a + or - sign is to keep in mind the magnitude of the number... let us consider your example ; you see 8>4 therefore after subtracting put the sign of the greater number(8 in this case).

positive # + negative # can go up or down... to understand this consider the example:8+ -10 = -2 this is because the value 10> 8 therefore you subtract and put the sign of the greater number.

keep in mind that always "MAGNITUDE" of the number decides the sign for the resulting number.

Answer 5

It depends on which of the numbers (without the sign) is larger...

8 + (-4)

8 is bigger than 4, so the answer is 4, not -4.
-------
If you had (-8) + 4, then it would be -4 because the 8 is bigger than the 4.

Answer 6

whatever no. has more weight will carry the value attached. say if your no. was -8 and +4. Adding them would make it:

(-8) +(+4)= -4

but since the value of 8 (more weight) is +ve compared to 4, it will carry that,

(+8) + (-4) this will become : 8-4 which is equals to +4.

This is called : BODMAS as a part of order of operations in mathematics.

Answer 7

you gave 8 + 4 = - 4

- - - - - - - -

In order to get - 4 as a answer you must have a - 8

- 8 + 4 = - 4

- 4 = - 4

- - - - - - - - - - s-

Answer 8

it depends
case 1: if the +ve # is larger than the -ve #, the total will go UP
case 2: if the +ve # is less than the -ve #, then total will go DOWN

your question involves case 1 where +ve # > -ve #
so the answer should be +4

Answer 9

You are right!
"Like" signs, when multiplied, yield + (i.e., plus)
"Opposite" signs, when multiplied, yield - (i.e., minus)
E.g., plus into plus = +
minus into minus = +
plus into minus = -
minus into plus = -
Further doubts? Feel free to ask. (Note "into" i.e., multiplication sign, in computers text, is generally, indicated by * A less common method, adopted locally in some places, is #)

Answer 10

+ve and -ve = -ve
-ve and +ve=-ve
+ve and +ve=+ve
-ve and -ve = +ve

your right!
when its addition or subtraction first look at the sign if its+ve and -ve or -ve and +ve you subtract the number and put the sign of the bigger number!
like
-6 + +3= -3
same applies when
+ve and +ve
-ve and -ve

+6 + +6= +12

and while multiplying or dividing
we use this
+ve and -ve = -ve
-ve and +ve=-ve
+ve and +ve=+ve
-ve and -ve = +ve