One of the most basic properties of addition is that it is commutative
. AKA it doesn't matter what order you add the numbers in, so long as addition and/or subtraction is all that you're doing.
that is to say that 50+25=75, and 25+50=75
And perhaps more importantly, addition is associative
, meaning that you can add more than two numbers together and get the same result.
Which is to say that 25+25+25=75, and 15+15+15+15+15=75
But how does it happen? How do you add? I will try and explain it in the next few steps