Units Tens Hundreds Thousands Ten thousands Hundred thousands Millions Tens of Millions Hundreds of millions Billions Tens of billions Hundreds of Billions Trillions Tens of trillions Hundreds of trillions Quadrillion Tens of Quadrillions Hundreds of Quadrillions Thousands of Quadrillions Quintillion Tens of Quintillions Hundreds of quintillions Thousands of quintillions Sextillions
Negative numbers get a bit strange because when you add a negative number to a negative number you are pretty much subtracting.
-39 -(40) = -79
Adding negative numbers is a bit easier.
Partitioning is when you take apart the number and then add it up again.