Back to Calculation Tips & Tricks

Squaring Numbers

Multiplying Numbers

Dividing Numbers

Adding Numbers

Subtracting Numbers

Finding Percents

Calculation Practice Exercises

Full List

See the pattern?

Alternate method: Subtract .1 of original number (move decimal one place left) from 2 times original number. Try this method, too. With some practice you will be able to give these products using one or both of these methods.

Alternate method: Subtract .1 of original number (move decimal one place left) from 2 times original number. Try this method, too.

With some practice you will be able to give these products using one or both of these methods.

[Privacy Policy] [Terms of Use]

Home || The Math Library || Quick Reference || Search || Help