Is the result of the process taken as a standard or not.
¿this¿ nature the rectangle”.
This aspect might never have struck you.
10a + (<…>) = (<…>+ b) +c
a+(b+1) = (a+b) +1
a + (b+2) = (a+b)+2
It you can't get out. You adopt a+(b+c) = (a+b)+c if you adopt a+(b+1) = (a+b) +1.