vedic maths
IT'S MENTAL math
calculating mentally, usually arithmetic
The only way to get good at math fast is to practice.
compatible number
Mathmatician
fast math . com
In other words, do the math in your head, not on paper.
i am not in middle school but we use fast math you have to have your user name and a lunch pin for when we use fast math but yours might be differen t
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Use A Calculator,"
practice
I'm assuming that you mean get used to math so you can do it fast. This may or may not be an easy goal for you but the only answer is Practice.