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how do I do 30 - 70 like where do i start without a calculator

Guest Mar 21, 2017
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 #1
avatar+4699 
+2

Just do this:

 

 70

-30

 40

 

Then make it negative.

You know that it will be negative because you are taking away more than you started with.

So

30 - 70 = - 40

hectictar  Mar 21, 2017
 #2
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+1

thnx so mooch now i weel win me tst tmr thx

Guest Mar 21, 2017

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