the.com/subtraction
Addition's suspicious twin, always asking what's missing.
means The arithmetic act of taking one quantity away from another to find what remains.
from From Latin subtrahere, 'to drag away from underneath' — sub ('under') plus trahere ('to drag' or 'pull'), the same trahere that gives us 'traction' and 'tractor'. The image is almost physical: pulling a hidden amount out from under the pile before you count what's left.
- origin
- from latin subtrahere meaning to drag away
- notation history
- minus sign only standardized in the 1500s
- borrowing concept
- invented to avoid negative numbers for centuries
- hidden identity
- secretly just addition of a negative number