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don't know sorry
10 tricks for doing fast math
Adding large numbers. Adding large numbers just in your head can be difficult. ...
Subtracting from 1,000. ...
Multiplying 5 times any number. ...
Division tricks. ...
Multiplying by 9. ...
10 and 11 times tricks. ...
Percentage. ...
Quickly square a two-digit number that ends in 5.
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D is correct answer
purple you
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