how do you add a positive number and a negative number?

Answer 1

Use a number line

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…-4,-3,-2,-1,0,1,2,3,4…

So if you had 2 and you wanted to subtract 3 from it you would have +2 + (-3) = ?
You start at two and count down three numbers which would give you -1.

You can already handle negative numbers when the positive number is positive. For example 6-2 is the same as 6 + (-2) = 4

Therefore you only have to worry about situations where the negative number is larger. In that case switch the sign and keep it negative. So +2 + (-3) = +2-+3= can’t do that so switch the order +3-+2 = 1, but we switched the sign so it is -1.

Answer 2

5 + - 4 = 5 - 4 Minus positive = minus
6 - + 7 = 6 - 7 Plus negitive = minus

6 + + 8 = 6+8 Plus positive = plus
3 - - 4 = 3+4 Minus negitive = plus

Answer 3

positive number :
+5+5=10
(+5)+(-6)= -1 same as 5-6= -1
you can alo goto the website or google it as well...