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11-04-2019
Mathematics

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How do you do 18-21 please help I don’t understand it

How do you do 1821 please help I dont understand it class=

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11-04-2019

18-21 Is -3
The reason that is the answer is when you look at a number like with a negative side like this for instance
-3 -2 -1 0 1 2 3
You’ll go into the negatives with is basically a backwards numberline hope this helps !

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