Add
-27+45
A. -72

B. -18

C. 18

D. 72

Question

Add
-27+45
A.   -72

B.   -18

C.    18

D.     72

anonymous · Answer

What do you need help with here?

anonymous · Answer

I know it is 72 but is it -72 or is it 72

anonymous · Answer

its 18

anonymous · Answer

But it says add

anonymous · Answer

I think -72

anonymous · Answer

Think of it as a straight line. With 0 in the middle.

-27 is 27 slots to the right of 0 right? 

You then want to add 42 slots. 
So adding you would go towards 0, and then keep going.

So the first 27 slots would be taken to get to 0. You then have 18 slots remaining of the 42 to go past 0.

anonymous · Answer

But why do u subtract

anonymous · Answer

Oh so it's 18

anonymous · Answer

Does this make sense or would you like a visual? I'd be happy to make one for you if that will help this make sense.

mle · Answer

you start at -27
then adding means to count to the right
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anonymous · Answer

It makes sense just to make sure it's c right

anonymous · Answer

Who could help me with another

mle · Answer

close this question to ask another