How to use it
- Write each number as a sum of place values.
- Operate on the parts.
- Recombine.
See it in action
347 + 286 = (300+200)+(40+80)+(7+6)=500+120+13=633.
How to verify it
Column addition gives the same total.
Decompose by Place Value
Break numbers into hundreds, tens, ones, tenths, and so on to expose structure.