#1**+8 **

Best Answer

**negative subtract a positive?**

**Let's try a few concrete examples:**

**-7 - +2 = -9**

**-7 - +10 = -17**

**-7 - +7 = -14**

**So we can generalize: the answer is negative.**

**➥ ➥**

Badinage
Apr 17, 2015

#2**+5 **

Thanks Badinage :)

When plusing and minusing directed numbers always think about the number line.

If you are working in an exercise book you ccan think about 0 being in the crease of your book and the positives will be on the right and the negatives will be on the left.

Like this:

say I want to find -2-6

I put my pen on the -2. I am subtracting so I go left towards the negative end.

Now i have to go left 6 places. That will land you on -8

Melody
Apr 17, 2015

#3**+5 **

Oh I didn't quite give the whole story.

you can think of positive numbers as hot numbers and negaive numbers as cold numbers.

If you take away heat it gets colder so - + = -

If you add cold into the room it gets colder + - = -

If you add heat it gets hotter + + = +

If you take cold away it also gets hotter - - = +

**These are only for when the signs are so close together that you can put a circle around them with nothing else in the way.**

Here is some more on this topic if you are interested :)

http://web2.0calc.com/questions/it-just-doesn-t-make-sense-to-me

Melody
Apr 17, 2015