Play some Chopin, I'm developing a migraine...I learned math starting 1982 in K and did some of this, but not enough IMO. I wish we had honestly. I can easily say to my son "doubles" or combine to 10 or something and he can figure it out much faster.
To me this is more of how one things with algebra in a way and that's not a bad thing. I know a LOT of parents hate it though and I'm an odd duck who thinks it's great to do.